[Reducing Mosaic]BLK-627 I got a new sister from my parents' remarriage (flashy, cold, and perverted), and now we share a room! I'm being trained every day by this tsundere slut... Tsukino Luna

When My Parents Remarried, I Suddenly Got A Gal Sister! Moreover, since my room is the only child's room, I decided to use it jointly. I'm worried... A hurtful word, "Dassa..." in a room full of otaku. But this older sister was actually quite a tsundere! I'm a virgin, and I'm too small to make a brush down as if to mock me, or to suck my cock when my parents aren't around! An older sister (Gal) and a younger brother (Otaku) who have different clothes, personalities, and hobbies live together in an incestuous way!