A deflowering cohabitation documentary following Haruka Usami as she transforms a shy cherry boy into a real man over one month. They agree not to have sex immediately—first enduring a week of restraint. Once his kindness and character pass her standards, he finally loses his virginity. Though not assertive, Haruka envelops him with gentle, motherly affection. Her warmth shifts his desire from simply wanting sex to genuinely wanting her. Their lovemaking, fueled by real feelings and tears shed at the painful thought of parting, blossoms into a bittersweet, emotional connection.