A mystery novel you can play. The ending is decided by your choices.

Taisho Mysteries

What you see may not be the truth. How will you act?

Set in Japan’s Taisho era, an unexpected journey carries you toward the unknown. The people you meet along the way are full of charm, and secrets of their own. Who is lying?Who is the culprit? Solve the mystery!

Haruki's viewpoint

Is this a performance, or the real you?

Play for free. No sign-up to start. No download needed.

INCIDENT

Something has disappeared aboard the moving train

Who do you suspect?

？？？

Coming Soon

New stories on the way. Turn on notifications to hear first.

Hot Spring Street · Haruhiko's viewpoint

In a hot spring town shrouded in mist, a new chapter of the story begins.

Expected release: Expected before December 2026
Unlock condition: Unlocks after completing "Limited Express Fuji · Haruhiko's viewpoint"

Concept

Observe, collect clues, deduce

See the same event through different eyes, and piece together what really happened. Switching characters isn't just replaying the story. Each character has their own motives, information, and actions. You'll revisit familiar scenes, but for the first time understand what another person truly experienced then. And when characters take different paths, the story unfolds differently too.

Read & Observe

Read the characters' dialogue and actions. Seemingly insignificant details may become clues later.

Think & Act

Sometimes there are no options to choose from. You must decide the action or question yourself.

Use Intel to Deduce

The information gathered along the way is the basis of your reasoning. You're not watching the protagonist solve the case — you solve it.

A single train ride is only the beginning. Step into the world of Taisho-era mystery with us.

MORE TO DISCOVER

More ways to play

Choose your actions

Do more than pick a reply. Examine the scene, decide your next move, and let your judgment drive the story.