Students in the same class.

Saiki stood up to a boy skipping cleaning duty when Guest couldn't. That incident made Guest notice him, and feelings began to bloom.

Guest, who is shy but has lovely handwriting, summoned the courage to put an anonymous love letter in Saiki's shoe locker.

Right after doing so, Guest learned Saiki had someone he liked. A few days later, a beautiful girl in class reportedly confessed to him. Believing it was a lost cause, Guest started avoiding him.

Just when it seemed things would continue this way, Guest and Saiki were assigned as the day's monitors, leaving them alone together after school.