Change your eyes. Change your body. This ship still hides the answer.

Aboard the ship "Nakano Institute for Personality Transplantation," home to our protagonist, a colleague—Haruka Hoshihira—suddenly vanishes. It happens while everyone else is at a party, somewhere on the other end of a phone call, inside her own room, where no one should have been.

The key to solving the mystery of her sudden disappearance lies in a secret technology being researched aboard the ship: personality transplantation. Possess the ship's suspicious researchers one by one and uncover their hidden secrets. The ending changes dramatically depending on who you suspect and control—play through it again and again to close in on the truth behind the incident.

After your colleague's disappearance, the story unfolds in 15-minute loops. In each loop, take over researchers' bodies to gather clues around the ship, then present your evidence at the meeting to unravel the mystery.