僕の妹が死んだ。

Contains ads
Content rating
Everyone 10+
100K+
Downloads
Content rating
Everyone 10+
Mild Violence
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this game

🔍My sister is dead—

📩A mysterious message left in her room
━━━━━━━━━━━━
 To Big Brother
 W-O-K-I-A-A
━━━━━━━━━━━━

While stunned, solving the mystery
brings you closer to a terrifying "certain truth"…

🕵️A suspect emerges with each mystery solved
⚠️There's a "contradiction" in the suspect's testimony…

—Can you find the culprit?—
Updated on
May 28, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity and Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

What’s new

細かな不具合の修正をしました
Content rating
Everyone 10+
Mild Violence
Learn more

App support

About the developer
GOLDEN DOG, K.K.
contact@goldendog.co.jp
6-23-4, JINGUMAE KUWANO BLDG. 2F. SHIBUYA-KU, 東京都 150-0001 Japan
+81 80-4444-5220

More by GOLDEN DOG, K.K.