Kazuaki Sakurai, a corporate worker, had an unfortunate encounter with a fellow passenger named Youichi Minagawa while commuting home one evening. This encounter resulted in the damage of Sakurai's work documents and outfit. Minagawa, who seemed disinterested in the situation, invited Sakurai to his residence to make amends. Despite hesitation, Sakurai accepted the invitation.
To Sakurai's surprise, Minagawa lived in a large house uncommon for someone his age as a college student. Although intrigued, their interaction ended without any expectations. However, fate had other plans in store for Sakurai as he found himself frequently returning to Minagawa's house. Their encounters brought them closer together, causing Sakurai's fascination with the young man to deepen. Additionally, Youichi displayed a side of himself that was only evident when Sakurai was present.