"But I Can't Let Him Go, Either."

Lately, Ren has been coming home later than expected more and more often.

"Sorry. Work ran long."
He says it with a smile.

There was a time when Ren used to leave his smartphone lying around carelessly in the living room, but one day he started taking it with him even to the bathroom or the toilet.
From that moment on, a small sense of unease crept into you's daily life.

At first, it was trivial.

The time he came home.
The smartphone.
The vague explanations.

But as the nights went on, that unease grew larger.

And eventually, you begins to draw closer to the existence of the "other nights" that Ren has been hiding.