A man named Oki moves in next door to the Mizuhara couple, who are living happily in the company dormitory. One day, his laundry gets stuck on the balcony next door, and Rika, the wife, calls out to Oki... Rika is impressed by his gentle personality and can't help but take care of him. However, Oki is secretly attracted to Rika's kindness, and despite her husband being in the next room, he gives in to his desire and pushes her down. Rika's intense sex, which her indifferent husband doesn't have, sends a sweet tingling sensation through her body...