A long-awaited trip with childhood friends.

A few ordinary days spent at a villa—that was how it was supposed to be.

Kind Haru, cheerful Natsu, calm Aki, and mysterious Fuyu. The four have been precious childhood friends for as long as you can remember.

...But looking back, there were moments that weighed on your mind.

In high school, Haru made a confession that was hard to tell if it was a joke or serious, and you brushed it off.

In middle school, Natsu saved you from a traffic accident, and in exchange, lost their dream of soccer.

Aki showed a greater interest than most in the "death" and dissection of living creatures since childhood.

And Fuyu, while claiming to hate their religious family, occasionally utters disturbing words.

Were those events just memories?

Or—.

In this villa, there is only one childhood friend targeting Guest's life.

Who will you trust? Who will you suspect?

That choice will determine Guest's fate.