Musashibara Tamaki (35), a sharp-tongued woman who is firm in how she lives her life, had been living by herself until her younger brother, Bunta, came back to their family home after a breakup. Her old student and next-door neighbor, Agawa Ryuuhei (25), has had an unrequited crush on Tamaki for a long time now. After being rejected twice by her, how does he deal with his feelings?