diff --git a/src/main/java/org/sopt/seonyakServer/domain/appointment/model/Appointment.java b/src/main/java/org/sopt/seonyakServer/domain/appointment/model/Appointment.java
index 420fd2d..b4f7fc9 100644
--- a/src/main/java/org/sopt/seonyakServer/domain/appointment/model/Appointment.java
+++ b/src/main/java/org/sopt/seonyakServer/domain/appointment/model/Appointment.java
@@ -30,37 +30,40 @@ public class Appointment {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @Column(name = "appointment_id")
-    private Long appointmentId;
+    @Column(name = "id")
+    private Long id;
 
     @ManyToOne(fetch = FetchType.LAZY, optional = false)
-    @JoinColumn(name = "member_id", referencedColumnName = "member_id", nullable = false)
+    @JoinColumn(name = "member_id", referencedColumnName = "id", nullable = false)
     private Member member;
 
     @ManyToOne(fetch = FetchType.LAZY, optional = false)
-    @JoinColumn(name = "senior_id", referencedColumnName = "senior_id", nullable = false)
+    @JoinColumn(name = "senior_id", referencedColumnName = "id", nullable = false)
     private Senior senior;
 
-    @Enumerated(EnumType.STRING)
-    @Column(name = "appointment_status", nullable = false)
-    private AppointmentStatus appointmentStatus;
-
     @Column(name = "time_list", columnDefinition = "jsonb", nullable = false)
     @Convert(converter = JsonConverter.class)
     private Map<String, Object> timeList;
 
-    @Column(name = "topic", length = 255)
+    @Column(name = "topic")
     private String topic;
 
-    @Column(name = "personal_topic", length = 255)
+    @Column(name = "personal_topic")
     private String personalTopic;
 
-    @Column(name = "reject_reason", length = 255)
-    private String rejectReason;
+    @Enumerated(EnumType.STRING)
+    @Column(name = "appointment_status", nullable = false)
+    private AppointmentStatus appointmentStatus;
 
-    @Column(name = "google_meet_link", length = 255)
+    @Column(name = "google_meet_link")
     private String googleMeetLink;
 
+    @Column(name = "reject_reason")
+    private String rejectReason;
+
+    @Column(name = "reject_detail")
+    private String rejectDetail;
+
     @Builder(access = AccessLevel.PRIVATE)
     private Appointment(
             Member member,
diff --git a/src/main/java/org/sopt/seonyakServer/domain/member/model/Member.java b/src/main/java/org/sopt/seonyakServer/domain/member/model/Member.java
index f172b05..da93c45 100644
--- a/src/main/java/org/sopt/seonyakServer/domain/member/model/Member.java
+++ b/src/main/java/org/sopt/seonyakServer/domain/member/model/Member.java
@@ -25,38 +25,38 @@ public class Member {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @Column(name = "member_id")
-    private Long memberId;
+    @Column(name = "id")
+    private Long id;
 
     @Enumerated(EnumType.STRING)
     @Column(name = "social_type", nullable = false)
     private SocialType socialType;
 
-    @Column(name = "social_id", nullable = false, length = 255)
+    @Column(name = "social_id", nullable = false)
     private String socialId;
 
-    @Column(name = "email", nullable = false, length = 255)
+    @Column(name = "email", nullable = false)
     private String email;
 
     @Column(name = "is_subscribed")
     private Boolean isSubscribed;
 
-    @Column(name = "nickname", length = 20)
+    @Column(name = "nickname")
     private String nickname;
 
-    @Column(name = "image", length = 255)
+    @Column(name = "image")
     private String image;
 
-    @Column(name = "phone_number", length = 255)
+    @Column(name = "phone_number")
     private String phoneNumber;
 
-    @Column(name = "univ_name", length = 255)
+    @Column(name = "univ_name")
     private String univName;
 
-    @Column(name = "field", length = 255)
+    @Column(name = "field")
     private String field;
 
-    @Column(name = "department", length = 255)
+    @Column(name = "department")
     private String department;
 
     @OneToOne(mappedBy = "member", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
diff --git a/src/main/java/org/sopt/seonyakServer/domain/member/service/MemberManagementService.java b/src/main/java/org/sopt/seonyakServer/domain/member/service/MemberManagementService.java
index 8864e17..d08f92c 100644
--- a/src/main/java/org/sopt/seonyakServer/domain/member/service/MemberManagementService.java
+++ b/src/main/java/org/sopt/seonyakServer/domain/member/service/MemberManagementService.java
@@ -22,6 +22,6 @@ public Long createMember(final MemberInfoResponse memberInfoResponse) {
                 memberInfoResponse.email()
         );
 
-        return memberRepository.save(member).getMemberId();
+        return memberRepository.save(member).getId();
     }
 }
diff --git a/src/main/java/org/sopt/seonyakServer/domain/member/service/MemberService.java b/src/main/java/org/sopt/seonyakServer/domain/member/service/MemberService.java
index 19e7cf2..fdcf52c 100644
--- a/src/main/java/org/sopt/seonyakServer/domain/member/service/MemberService.java
+++ b/src/main/java/org/sopt/seonyakServer/domain/member/service/MemberService.java
@@ -79,7 +79,7 @@ public Long getMemberIdBySocialId(
                 () -> new CustomException(ErrorType.NOT_FOUND_MEMBER_ERROR)
         );
 
-        return member.getMemberId();
+        return member.getId();
     }
 
     public LoginSuccessResponse getTokenByMemberId(final Long id) {
diff --git a/src/main/java/org/sopt/seonyakServer/domain/senior/model/Senior.java b/src/main/java/org/sopt/seonyakServer/domain/senior/model/Senior.java
index 47999f3..f98e0df 100644
--- a/src/main/java/org/sopt/seonyakServer/domain/senior/model/Senior.java
+++ b/src/main/java/org/sopt/seonyakServer/domain/senior/model/Senior.java
@@ -25,68 +25,79 @@ public class Senior {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @Column(name = "senior_id")
-    private Long seniorId;
+    @Column(name = "id")
+    private Long id;
 
     @OneToOne(optional = false)
-    @JoinColumn(name = "member_id", referencedColumnName = "member_id", nullable = false)
+    @JoinColumn(name = "member_id", referencedColumnName = "id", nullable = false)
     private Member member;
 
-    @Column(name = "business_card", nullable = false, length = 255)
+    @Column(name = "business_card", nullable = false)
     private String businessCard;
 
-    @Column(name = "company", length = 255)
+    @Column(name = "company")
     private String company;
 
-    @Column(name = "position", length = 255)
+    @Column(name = "position")
     private String position;
 
-    @Column(name = "detail_position", nullable = false, length = 255)
+    @Column(name = "detail_position", nullable = false)
     private String detailPosition;
 
     @Column(name = "level", nullable = false)
-    private Integer level;
+    private int level;
 
-    @Column(name = "catchphrase", length = 255)
+    @Column(name = "catchphrase")
     private String catchphrase;
 
-    @Column(name = "career", length = 255)
+    @Column(name = "career")
     private String career;
 
-    @Column(name = "award", length = 255)
+    @Column(name = "award")
     private String award;
 
-    @Column(name = "story", length = 255)
+    @Column(name = "story")
     private String story;
 
-    @Column(name = "preffered_time_list", columnDefinition = "jsonb")
+    @Column(name = "is_day_of_week", nullable = false)
+    private Boolean isDayOfWeek;
+
+    @Column(name = "preferred_time_list", columnDefinition = "jsonb")
     @Convert(converter = JsonConverter.class)
-    private Map<String, Object> prefferedTimeList;
+    private Map<String, Object> preferredTimeList;
 
     @Builder(access = AccessLevel.PRIVATE)
     private Senior(
             Member member,
             String businessCard,
             String detailPosition,
-            Integer level
+            int level,
+            Boolean isDayOfWeek,
+            Map<String, Object> preferredTimeList
     ) {
         this.member = member;
         this.businessCard = businessCard;
         this.detailPosition = detailPosition;
         this.level = level;
+        this.isDayOfWeek = isDayOfWeek;
+        this.preferredTimeList = preferredTimeList;
     }
 
     public static Senior createSenior(
             Member member,
             String businessCard,
             String detailPosition,
-            Integer level
+            int level,
+            Boolean isDayOfWeek,
+            Map<String, Object> preferredTimeList
     ) {
         return Senior.builder()
                 .member(member)
                 .businessCard(businessCard)
                 .detailPosition(detailPosition)
                 .level(level)
+                .isDayOfWeek(isDayOfWeek)
+                .preferredTimeList(preferredTimeList)
                 .build();
     }
 }
diff --git a/src/main/java/org/sopt/seonyakServer/domain/university/model/Department.java b/src/main/java/org/sopt/seonyakServer/domain/university/model/Department.java
index 541f401..06d0b7b 100644
--- a/src/main/java/org/sopt/seonyakServer/domain/university/model/Department.java
+++ b/src/main/java/org/sopt/seonyakServer/domain/university/model/Department.java
@@ -22,24 +22,24 @@ public class Department {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @Column(name = "dept_id")
-    private Long deptId;
+    @Column(name = "id")
+    private Long id;
 
     @ManyToOne(fetch = FetchType.LAZY, optional = false)
-    @JoinColumn(name = "univ_id", referencedColumnName = "univ_id", nullable = false)
+    @JoinColumn(name = "univ_id", referencedColumnName = "id", nullable = false)
     private University university;
 
-    @Column(name = "dept_name", nullable = false, length = 20)
+    @Column(name = "dept_name", nullable = false)
     private String deptName;
 
     @Column(name = "is_closed", nullable = false)
-    private Boolean isClosed;
+    private boolean isClosed;
 
     @Builder(access = AccessLevel.PRIVATE)
     private Department(
             final University university,
             final String deptName,
-            final Boolean isClosed
+            final boolean isClosed
     ) {
         this.university = university;
         this.deptName = deptName;
@@ -49,7 +49,7 @@ private Department(
     public static Department createDepartment(
             final University university,
             final String deptName,
-            final Boolean isClosed
+            final boolean isClosed
     ) {
         return Department.builder()
                 .university(university)
diff --git a/src/main/java/org/sopt/seonyakServer/domain/university/model/University.java b/src/main/java/org/sopt/seonyakServer/domain/university/model/University.java
index 12f7f66..cc4615b 100644
--- a/src/main/java/org/sopt/seonyakServer/domain/university/model/University.java
+++ b/src/main/java/org/sopt/seonyakServer/domain/university/model/University.java
@@ -23,10 +23,10 @@ public class University {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @Column(name = "univ_id")
-    private Long univId;
+    @Column(name = "id")
+    private Long id;
 
-    @Column(name = "univ_name", nullable = false, length = 255)
+    @Column(name = "univ_name", nullable = false)
     private String univName;
 
     @OneToMany(mappedBy = "university", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
diff --git a/src/main/java/org/sopt/seonyakServer/domain/util/JsonConverter.java b/src/main/java/org/sopt/seonyakServer/domain/util/JsonConverter.java
index 76195cf..9c5280d 100644
--- a/src/main/java/org/sopt/seonyakServer/domain/util/JsonConverter.java
+++ b/src/main/java/org/sopt/seonyakServer/domain/util/JsonConverter.java
@@ -7,6 +7,8 @@
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
+import org.sopt.seonyakServer.global.exception.enums.ErrorType;
+import org.sopt.seonyakServer.global.exception.model.CustomException;
 
 @Converter
 public class JsonConverter implements AttributeConverter<Map<String, Object>, String> {
@@ -18,7 +20,7 @@ public String convertToDatabaseColumn(Map<String, Object> attribute) {
         try {
             return objectMapper.writeValueAsString(attribute);
         } catch (JsonProcessingException e) {
-            throw new RuntimeException("Error converting map to JSON string.", e);
+            throw new CustomException(ErrorType.MAP_TO_JSON_ERROR);
         }
     }
 
@@ -27,7 +29,7 @@ public Map<String, Object> convertToEntityAttribute(String dbData) {
         try {
             return objectMapper.readValue(dbData, HashMap.class);
         } catch (IOException e) {
-            throw new RuntimeException("Error converting JSON string to map.", e);
+            throw new CustomException(ErrorType.JSON_TO_MAP_ERROR);
         }
     }
 }
diff --git a/src/main/java/org/sopt/seonyakServer/global/exception/enums/ErrorType.java b/src/main/java/org/sopt/seonyakServer/global/exception/enums/ErrorType.java
index 8379f02..e328d60 100644
--- a/src/main/java/org/sopt/seonyakServer/global/exception/enums/ErrorType.java
+++ b/src/main/java/org/sopt/seonyakServer/global/exception/enums/ErrorType.java
@@ -22,6 +22,8 @@ public enum ErrorType {
     INVALID_CODE_HEADER_ERROR(HttpStatus.BAD_REQUEST, "40007", "code 헤더값의 형식이 잘못되었습니다."),
     INVALID_SOCIAL_TYPE_ERROR(HttpStatus.BAD_REQUEST, "40008", "유효하지 않은 Social Type입니다."),
     BEARER_LOST_ERROR(HttpStatus.BAD_REQUEST, "40009", "요청한 토큰이 Bearer 토큰이 아닙니다."),
+    MAP_TO_JSON_ERROR(HttpStatus.BAD_REQUEST, "40016", "Map을 JSON 문자열로 변환하는 중 오류가 발생했습니다."),
+    JSON_TO_MAP_ERROR(HttpStatus.BAD_REQUEST, "40017", "JSON 문자열을 Map으로 변환하는 중 오류가 발생했습니다."),
 
     // S3 관련 오류
     IMAGE_EXTENSION_ERROR(HttpStatus.BAD_REQUEST, "40051", "이미지 확장자는 jpg, png, webp만 가능합니다."),