Ataru is a university student currently job hunting, but is having a hard time getting a job offer. One day, he decides he needs a break and takes a weekend off to stay at his aunt Makoto's house. Ataru has always admired the beautiful Makoto, who has always been very tolerant and on his side. This time, Makoto treats him kindly as always, and he goes to bed satisfied, but in the middle of the night he wakes up to a wailing sound. There, he somehow sees Makoto having sex with his uncle...