My girlfriend who has a boyfriend comes to stay over every day and unconsciously seduces me. I can't muster up the courage and I'm in a state of limbo. Mei Itsukaichi

The story revolves around a complicated living arrangement where the protagonist, whose name is not explicitly mentioned, finds himself caught in a web of relationships and desires. Mei Itsukaichi, the titular character, is someone else's girlfriend but frequently visits the protagonist, creating a sense of longing and unrequited love. As various individuals visit and spend time in the protagonist's space, boundaries are tested, and personal desires become increasingly intertwined. The central tension lies in navigating these complex relationships while dealing with one's own suppressed feelings and the constraints of societal expectations.