19-year-old Emi, a true virgin who has never had a boyfriend, enters a cohabitation experiment with a stranger in this documentary-style production. It realistically captures her journey leading up to her first sexual experience. Through daily life together, we witness her emotional transformation, culminating in her decision to lose her virginity—an intimate portrayal of her personal growth and shifting feelings. A deeply moving story woven from innocence and the courage to face the unknown.