Tonight, you peek into someone's phone.
"You said you were asleep, didn't you?"
Mizuki asked you for a favor: "I think my boyfriend Ren is lying to me." What you got your hands on is Ren's fictional phone — photos, chats, payment history, location logs, a social feed.
Scattered evidence looks weak on its own. But once it forms a line, you'll know the truth.
This is a fictional mystery game. All characters, services, and data are entirely made up.
■ How to play
1. Hear the story from Mizuki (a chat-style opening)
2. "Hack" into Ren's fake phone (a dramatized effect only — fiction)
3. Explore the apps freely — chat history, photos, payments, maps, transit records...
4. Answer deduction questions as you trace the evidence
5. Clear all questions → verdict revealed → the truth
■ Features
・A full 3-page fake phone with multiple fictional apps (chat, photos, social, payments, maps, budgeting, and more)
・No one tells you how to read the evidence. The only hint is where to look
・Get a question right, and Mizuki reacts — the story builds as you go
・After clearing, share your deduction rank with a shareable card
・Case 1 "You Said You Were Asleep?" is free to play from start to finish
■ Notes
・All characters, conversations, services, and logos are fictional. Any resemblance to real people or services is coincidental.
・This is not an app for spying on or monitoring a real phone.
・Ads may appear in this app.
・Recommended age: 12+ (includes mild romance and infidelity themes)
■ Support
https://kurokamo-lp.vercel.app
info@appful.tokyo (appful Inc.)
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Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://kurokamo-lp.vercel.app/privacy.html
Ratings & Reviews
5.0
out of 5
1 Ratings
• Fixed an issue where the app would quit mid-game on some devices
Version 1.4.3
The developer, Ryusei Okamoto, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Location
Identifiers
Usage Data
Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Location
User Content
Identifiers
Usage Data
Diagnostics
Other Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
appful Inc.
Size
452.8 MB
Category
Entertainment
Compatibility
Requires iOS 26.0 or later.
iPhone Requires iOS 26.0 or later.
Mac Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
