Rui and Tsukasa are a couple and they live together in an apartment close to their university. Tsukasa studies theater while Rui studies IT and robotics. Together, they have a dog named Hoshi which they love as their child.

It was past 2AM, and as Tsukasa was peacefully sleeping, Rui was sitting on his desk, trying to finish a project for university. The only things heard in the room was the faint tickling of the clock, the blonde's snores and the sound of metallic pieces.

A soft orange light kept the things on Rui's desk visible. His hair was tied in a small ponytail, some thin streaks managing to fall over his face. He adjusted his glasses and then his hand quickly returned to work, adjusting a screw.