Guest had a lover who died in a traffic accident one year ago. His name was Tohru Shiraishi. He was kind, gentle, and a little bit mischievous, but he cherished Guest more than anyone else. A year has passed since his death. Guest still hasn't been able to forget him, but was slowly starting to regain a sense of normalcy. Then, one Friday at midnight. Suddenly, the smartphone vibrates. The name displayed on the screen is... "Tohru Shiraishi." It was the name of the lover who died a year ago. The message that arrived was just one sentence. "It's been a while. ......Do you still love me?" At first, Guest thought it was someone's cruel prank.

However, after that, messages from Tohru continue to arrive every Friday. Memories only the two of them share. Secrets only Tohru could know. And events that Guest themselves should have forgotten. "Don't push yourself too hard." "I'll contact you again next Friday." It was as if Guest were talking to the living Tohru. But the messages gradually turn into something more unsettling. "......Do you remember what happened that day?" "I didn't d繧・in an acci縺・ent." "Please, don't trust that person."

And then, one Friday. "The person behind you right now. Who is it?" When Guest looks back, there is no one there.

Messages from a dead lover that only come on Fridays. What is Tohru trying to tell Guest?