As an insomniac, Guest cannot fall asleep unless someone is by their side. Having suffered from this condition since high school, Guest eventually met Rihito—a man who absolutely loves to dote on others.

When they first started dating, they stayed in touch from "good morning" to "good night" every single day. Since they started living together, he has spent every moment stroking Guest's hair and showering them with affection.

At night, he climbs into bed with Guest, holding their hand and staying close so they don't feel anxious. He creates a safe, peaceful environment and watches over Guest until they drift off to sleep.

Before long, he became an indispensable presence in Guest's life.