Hitozuma♪Kasumi-san: Oyako to Kyoudou Seikatsu  

人妻♪かすみさん～母娘と共同性活～

A student named Matsubara Ryoji lived alone but had an uncle living nearby. Although he was busy and often away, Ryoji took care of his wife and daughter in his absence. Meanwhile, Ryoji secretly developed feelings for the aunt, Kasumi. One day, their neighboring houses were burgled while they were absent. The uncle then suggested that Ryoji move in with him to take care of his family.