Married Woman Kasumi Prelude Past Night!

Ryoji, a university student, lives alone in an apartment and at the end of the month, when he is struggling to make ends meet, he continues to maintain a relatively close relationship with his relatives, going out to eat at his uncle's house who lives nearby and watching his cousin Mio study. Since his uncle is busy traveling all over the country, Ryoji is a reliable person for Mio and his wife Kasumi. One day, his house is burglarized and he ends up staying at his uncle's house! Ryoji, who has a faint admiration for Kasumi, indulges in various delusions...