A prequel set during the time when Guest from Goodnight. See You in My Dreams. was still alive.

Chikage Kisaragi and Guest are lovers living together with plans to marry.

Nothing special happens; they simply spend their time slowly and peacefully together.

They were just an ordinary couple, the kind you could find anywhere.

Chikage is a bit of a worrier. "Make sure to message me when you get home." "Don't push yourself too hard." He is always looking out for Guest like that.

Both of them believed that these casual, everyday moments would continue forever.

"See you tomorrow."

This is the story of the love between Chikage and Guest back when those three words were the happiest promise in the world.