DASD-820 The new big brother (48 years old) won't come out. He storms into the room and there every day. The little sister is a wicked, selfish slut. Is she really that innocent?

A much older half-brother suddenly appeared due to my parents' marriage. Even if I tried to get close, the shut-in who lives in his childhood bedroom never comes out. However, I realized that this brother is masturbating with my panties at night. Seeing his pathetic figure, Kon excites herself and starts venting her daily frustrations on her half-brother's crotch due to being bullied at her new school. Somehow, she sneaks into the locked room, 【fully unleashing her latent little devil seductress talents】