diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/event/EventService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/event/EventService.kt
index ff4ea05f..604b631b 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/event/EventService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/event/EventService.kt
@@ -228,7 +228,7 @@ class EventService(
             )
         }
 
-        if (event.link != link) {
+        if (link != null && event.link != link) {
             event.link = link
         }
 
@@ -240,7 +240,7 @@ class EventService(
             event.isPopup = isPopup
         }
 
-        if (isAdult != event.isAdult) {
+        if (isAdult != null && isAdult != event.isAdult) {
             event.isAdult = isAdult
         }
 
diff --git a/src/test/kotlin/kr/co/vividnext/sodalive/event/EventControllerIntegrationTest.kt b/src/test/kotlin/kr/co/vividnext/sodalive/event/EventControllerIntegrationTest.kt
index 98f20c63..79845357 100644
--- a/src/test/kotlin/kr/co/vividnext/sodalive/event/EventControllerIntegrationTest.kt
+++ b/src/test/kotlin/kr/co/vividnext/sodalive/event/EventControllerIntegrationTest.kt
@@ -5,19 +5,25 @@ import kr.co.vividnext.sodalive.i18n.Lang
 import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.member.MemberAdapter
 import kr.co.vividnext.sodalive.support.EmbeddedRedisInitializer
+import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Test
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.NullSource
+import org.junit.jupiter.params.provider.ValueSource
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc
 import org.springframework.boot.test.context.SpringBootTest
 import org.springframework.boot.test.mock.mockito.MockBean
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken
 import org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.authentication
+import org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.user
 import org.springframework.test.annotation.DirtiesContext
 import org.springframework.test.context.ContextConfiguration
 import org.springframework.test.web.servlet.MockMvc
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put
 import org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath
 import org.springframework.test.web.servlet.result.MockMvcResultMatchers.status
 import java.time.LocalDateTime
@@ -108,6 +114,70 @@ class EventControllerIntegrationTest @Autowired constructor(
             .andExpect(status().isUnauthorized)
     }
 
+    @ParameterizedTest
+    @NullSource
+    @ValueSource(booleans = [true, false])
+    @DisplayName("이벤트 제목만 수정하면 생략한 링크와 성인 여부 등 나머지 필드를 보존한다")
+    fun shouldPreserveOmittedFieldsWhenUpdatingOnlyTitle(isAdult: Boolean?) {
+        val event = saveEventForUpdate(isAdult)
+
+        mockMvc.perform(updateRequest(event).param("title", "updated"))
+            .andExpect(status().isOk)
+            .andExpect(jsonPath("$.success").value(true))
+
+        assertEquals(event.copy(title = "updated"), eventRepository.findById(requireNotNull(event.id)).orElseThrow())
+    }
+
+    @ParameterizedTest
+    @ValueSource(booleans = [true, false])
+    @DisplayName("이벤트 수정은 명시한 링크와 성인 여부를 저장한다")
+    fun shouldPersistExplicitLinkAndAdultFlag(isAdult: Boolean) {
+        val event = saveEventForUpdate(!isAdult)
+
+        mockMvc.perform(
+            updateRequest(event)
+                .param("link", "https://event.test/updated")
+                .param("isAdult", isAdult.toString())
+        )
+            .andExpect(status().isOk)
+            .andExpect(jsonPath("$.success").value(true))
+
+        assertEquals(
+            event.copy(link = "https://event.test/updated", isAdult = isAdult),
+            eventRepository.findById(requireNotNull(event.id)).orElseThrow()
+        )
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = ["", "   "])
+    @DisplayName("이벤트 수정은 빈 링크 원문을 저장하고 생략한 성인 여부를 보존한다")
+    fun shouldPersistBlankLinkWithoutChangingOmittedAdultFlag(link: String) {
+        val event = saveEventForUpdate()
+
+        mockMvc.perform(updateRequest(event).param("link", link))
+            .andExpect(status().isOk)
+            .andExpect(jsonPath("$.success").value(true))
+
+        assertEquals(event.copy(link = link), eventRepository.findById(requireNotNull(event.id)).orElseThrow())
+    }
+
+    private fun updateRequest(event: Event) =
+        put("/event")
+            .param("id", event.id.toString())
+            .with(user("admin").roles("ADMIN"))
+
+    private fun saveEventForUpdate(isAdult: Boolean? = true): Event {
+        return eventRepository.saveAndFlush(
+            saveControllerEvent("original", Lang.EN).apply {
+                link = "https://event.test/original"
+                this.isAdult = isAdult
+                isActive = false
+                startDate = LocalDateTime.of(2099, 1, 1, 0, 0, 0)
+                endDate = LocalDateTime.of(2099, 1, 2, 23, 59, 59)
+            }
+        )
+    }
+
     private fun saveControllerEvent(seed: String, lang: Lang): Event {
         return eventRepository.saveAndFlush(
             Event(