BBAN-600 Having missed the last train, she finds herself alone in a hotel room with her admired senior colleague. Convinced that they're both women, she gives in to her advances and, telling herself it's okay, succumbs to a cheating lesbian encounter. (Sato Airu, Ouka Rin)

Airu, who landed a job at the same company as her admired senior, Rin, is so happy that she drinks too much at their first company drinking party. Having missed the last train, Airu agrees to stay in the same hotel room with Rin until morning... but the confinement of the room throws both their feelings and their reason into disarray... She discovers a side of her admired senior that she never knew existed. "I can't believe it's my senior," she thinks as she's approached with a seductive expression...