[SSIS-300] I Was Left Alone With My Girlfriend’s Hot Sister… All Of A Sudden, She’s All Over Me! She Kisses, Licks, And Fucks Me… And I Let Her. Does This Make Me A Jerk? Tsukasa Aoi

Aoi is looking for a job in Tokyo at decides to crash at the house of her sister, who is married.

Eventually, the sister goes away to visit the parents and she was supposed to be leaving too, but Aoi decides to secretly stay and bang the husband.