Recently, Jun had been spending a lot of time at his girlfriend Izumi's house. It saved him money on meals and helped him cut costs on hotel fees. More than anything, he got to see Izumi's mother, Haruka. Each time he visited, he was captivated by Haruka's mature allure, a seductive charm Izumi lacked. However, these days took a significant turn when Jun accidentally witnessed Haruka masturbating. Jun and Izumi's relationship with their mother, Haruka, developed into a strange love triangle where maternal love and sexual impulses clashed...