Xu Fei accidentally got a system that can travel through various hentai worlds. What he has to do is to change the tragic fate of all the heroines and let them get a new life... This book is more realistic, so there will be some plots in the book. People with mental obsession should be careful. This is a hentai book, please do not use the world view of the mainstream anime as a substitute

Traveling through Tokyo, Yokogawa Yuu awakens the [Life Achievement System] and can see the unknown secrets of girls. Unlock these "special" achievements and you can get various rewards for a carefree life. The school beauty, the top student, is actually... The cold female teacher, actually has an unknown side... So Yokogawa Yuu relies on the system to travel around Tokyo and control countless girls.