Sunao Saiki, a struggling college student, moves into a new apartment and, to his surprise, falls in love with his neighbor—an attractive married woman named Ayano Shinonome. Soon, by a twist of fate, they find themselves working together at a part-time job, where Ayano showers the young man with care and attention. Torn between respect and a growing attraction to another man’s wife, Saiki tries to suppress his feelings. However, Ayano herself has seen in him traits of her first love, and she, too, begins to feel drawn to him, leading to the development of a forbidden romance…