Osta Red Chat Ritual: Tsumimi Time PC

As a viewer, intervene in streamer Tsumimi’s livestreams over 15 days and uncover the truth behind the disappearance of her former partner, Mashiro.
A psychological horror adventure built around a day-and-night cycle of stream intervention, investigation, and deduction.

■ Intervene in the stream. Uncover the truth.

• Mashiro, your favorite streamer, is missing.
  Intervene in Tsumimi's livestream, investigate the clues, and uncover the truth.

■ As a viewer, use comments, Mega Chats, and gifts to change the story.

■ Investigate clues hidden outside the stream across fan sites, social media, and more.

■ Connect the clues, make your deductions, and uncover the hidden truth.

By day, investigate strange details through social media, fan sites, maps, and search results.

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

What will you say?

When will you stay silent?

How will you use your limited funds?

And how will you connect the fragments before it is too late?

This is a 15-day psychological horror adventure about stream intervention, investigation, and deduction.

Before You Play

Red Chat Ritual – TSUMIMI TIME is a horror-mystery adventure in which you intervene in Tsumimi’s livestreams

and piece together the truth behind the case through investigation and deduction.

Progress through the story by investigating, making deductions, and intervening in livestreams. Your choices affect more than immediate reactions—they can also shape later events and the ending.

[Playtime and Gameplay Notes]

・First playthrough: Approximately 4 hours

・Total playtime: Approximately 8–9 hours (estimated time to experience multiple endings)

・Save data from the demo cannot be carried over to the full game.

・When seeking multiple endings, you may need to replay scenes shared across different routes.

▼Content Advisory

The game depicts intrusive behavior toward a livestream, unsettling scenes, psychological tension, and horror elements.

※Jump scares involving loud sounds or sudden screen changes are used sparingly.

※This game contains sensitive material, including depictions of violence and blood, as well as content related to self-harm and suicide.

[Investigate by Day. Intervene by Night.]

Behind Tsumimi’s cute livestream lies the shadow of Mashiro’s disappearance.

Tsumimi smiles on screen.

Rumors flow through the comments.

Unsettling records appear in search results.

Someone’s obsession remains on a fan site.

The deeper you look beyond the stream, the closer you get to the truth.

[Your Deductions Change the Ending]

Multiple endings await.

Your interventions, investigations, deductions, and choices will shape Tsumimi’s stream and determine how the story ends.

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.

▼Audio Note

This game uses close, detailed environmental audio to create the feeling of sound pressing in from all around you.

For the best experience, we recommend playing with headphones or earbuds.