I got a stepsister from my parents' remarriage. She's incredibly cute, but she's really shy and weak-willed. She can't refuse unpleasant things, so she gets harassed every day! Wearing defenseless clothing and persistently touching a girl's nipples made her drool uncontrollably, cumming multiple times just from her nipples alone. She ended up transforming into a perverted girl! In the end, she grew into a strong girl who could say 'I want my brother to touch my nipples'!
