A young man travels to the countryside for the summer to look after his cousin, Hazuki, at the request of his aunt. However, the quiet rural getaway quickly turns passionate as the two rediscover each other and spend their days indulging in secret, intimate encounters.
Hazuki spends her summer break balancing schoolwork and leisure with frequent, passionate encounters with her partner. Whether it's during a neighbor's visit or while experimenting with new outfits, the pair indulges in their desires throughout the sweltering heat. A year later, the partner returns to the countryside, reuniting with Hazuki after finding local employment.