Tsubaki wants to escape her cold marriage, so after work she accepts coworker Kazuma's invitation. She only means to unwind at his small apartment, but the scent and presence of a man other than her husband keep her heart racing. Just as she decides she must leave, Kazuma passionately confesses his feelings. She knows she should reject him, yet secretly feels overjoyed—and their forbidden encounter leads to sex and a creampie.