ROYD-360 A shy and modest younger stepsister became extremely sensitive after being teased day after day, and now she reaches climax over and over! She transforms into a perverted girl who keeps climaxing with a vulgar expression. Rihho Shishido

My parents remarried, and I ended up with a stepsister. She was incredibly cute, but also very shy and timid. Taking advantage of how she couldn’t bring herself to firmly refuse things she disliked, I kept teasing her every day. Over time, she became so sensitive that even the slightest touch would make her react strongly, and she gradually transformed into a very flustered, easily embarrassed girl. In the end, she grew into a more confident schoolgirl who could clearly say, I want my brother to touch my chest.