Moving into a temporary apartment complex, Saki notices a young male student living next door. Playfully teasing, she exposes her bare, see-through nipples and adopts a provocative attitude. Dissatisfied with her sex life with her husband and filled with pent-up frustration, this married woman can't fully hide her sweat-soaked, braless nipples, secretly drawing closer to the young man. Then, during a summer when the heat reaches its peak, she turns off the air conditioner, turning her room into a sweltering, steamy space. The two entwine, drenched in sweat—their heated encounter revealing the eroticism hidden within everyday life, along with a fetishistic obsession with sweat and translucent nipples.