Planned Release Date: October 2026

About This Game

- Steam Next Fest: June 2026 Edition -
Play the first 6 days of the roughly 14-day story for free in the Steam Next Fest demo.
The demo includes stream intervention, investigation, Mega Chats, and the first investigation-and-deduction sequence.

To pursue the whereabouts of your missing oshi, Mashiro, intervene through chat in the streams of her former partner, Tsumimi, and investigate, connect clues, and deduce the truth. This is a “a psychological horror adventure about stream intervention, investigation, and deduction” structured around a 14-day day-and-night cycle.

• Intervene in live stream comments as a viewer, and change the ending of the story.

• Investigate clues hidden on fan sites and social media.

• Close in on the truth through comments, choices, and deductions.

Why did your missing favorite, Mashiro, vanish?

The clues lie in the streams of Mashiro’s partner, Tsumimi, and in fragments scattered across the internet.

Send comments. Send Mega Chats. Send gifts.

Each action changes where she goes, the look on her face, and the atmosphere of the stream.

[Investigate by day, intervene in streams by night. Your choices change the next stream]

TSUMIMITIME is a psychological horror ADV in which you, as a viewer, intervene through chat in the streams of Tsumimi, the former partner of your missing oshi, Mashiro, as you pursue her whereabouts.

By day, use odd details caught on stream as clues and investigate through SNS, Fan Sites, maps, and searches.

By night, watch Tsumimi’s stream and intervene through comments, Mega Chat, and gifts.

How will you connect the fragments you gather? How will you spend your limited funds?

What words will you send? When will you stay silent and simply watch?

To pursue the whereabouts of your missing oshi, Mashiro,

you can no longer just watch.

[Behind the cute livestream is the shadow of a disappearance]

Tsumimi smiles on screen. Rumors flow through the comment section.

Unsettling records found through searches. Someone’s obsession left behind on a Fan Site.

The deeper you step behind the cute stream screen, the darker the shadow of Mashiro’s disappearance grows.

Your intervention, investigation, deduction, and choices will change Tsumimi’s stream and the ending.

[Your choices change the ending]

Multiple endings.

Through the accumulation of your interventions, investigations, and deductions, the story branches into multiple endings.

The actions you choose and the answers you reach will determine how the story ends.

Play Time

About 3 hours per playthrough.

With multiple endings included, total play time is around 4 to 5 hours.

Content Warning

Depictions include excessive intervention in streams, unsettling presentation, psychological tension, and horror elements.

Jump scares with loud noises or sudden screen changes are limited.

Reach the truth through your own choices.

____________________

◼︎Character Introductions

■Idol gallery

▼Required PC Specs

This game does not rely on demanding 3D graphics processing. It is designed to be easy to play across a wide range of PC environments.

Please check the system requirements at the bottom of the page for detailed specifications.

Mature Content Description

The developers describe the content like this:

This game contains psychological horror, depictions of violence and blood, and references to self-harm and suicide. It does not contain explicit sexual content.