Lust System: Monster girl Harem - Chapter 31 Pure Ecstasy (+18)

Jing Yan, a once top-performing genius of the Jing Clan who broke through the rank of Ninth Heaven of martial arts and entered the Precelestial Rank at 16, was second to none in Dong Lin City. Yet out of nowhere, his rank dropped dramatically after he was enrolled in the Wind God Institute and became the object of ridicule.After breaking the seal of The Ring of the Universe, Jing Yan was reborn. He finally became the conqueror of The Mainland of Tian Yuan and became the man countless warriors looked up to.

Lingyun, a fierce and savage cultivation genius takes over a dead teenager’s body. Coincidentally, they are both named Lingyun. Set in a alternate version of the 21st century, teenager Lingyun has been killed by someone with a grudge.

- Description from Novelupdates

Kōdo Ikusei Senior High School, a leading prestigious school with state-of-the-art facilities where nearly 100% of students go on to university or find employment. The students there have the freedom to wear any hairstyle and bring any personal effects they desire. Kōdo Ikusei is a paradise-like school, but the truth is that only the most superior of students receive favorable treatment.

The protagonist Kiyotaka Ayanokōji is a student of D-class, which is where the school dumps its “inferior” students in order to ridicule them. For a certain reason, Kiyotaka was careless on his entrance examination, and was put in D-class. After meeting Suzune Horikita and Kikyō Kushida, two other students in his class, Kiyotaka’s situation begins to change.

"Stay with me and I will give you everything your heart desires. For you, my darling, I would part the mountains, split the sea, and cause havoc on Earth just to have you."