Kana lives with her younger sister Nagisa and Nagisa's husband Keita. Originally, she was living with Nagisa, but then Keita came and moved in with her after they got married. She wasn't angry, but was actually happy to have a cute little brother. One day, Kana got home late from work and was dozing off on the last train home when she felt someone looking at her from the seat opposite. When she opened her eyes slightly, she saw Keita intently gazing at Kana's lower body and stroking his dick. Kana was surprised, but at the same time, her lewd feelings started to rise up, so she lifted her skirt and started to seduce him with a panty shot.
