Girlfriend’s Younger Sister

Description Girlfriend’s Younger Sister: I got confused with my girlfriend, so I ended up in the same bed with her younger sister… ?! Kazushi proposed to his beloved girlfriend Haruka and went to say hello to her parents’ house. There she meets Haruka’s younger sister Yuki… That night, while Kazushi, who had stayed overnight at Haruka’s house, was sleeping on a futon in her living room, “someone” came under the