Love Slave to My Devil CEO Boss R18 - Chapter 75

Song Yan, a senior high school student, lost his parents when he was a child. Before obtaining a mysterious and amazing ring, he has been often plunged into a vulnerable position and easily marginalized. However, his life is changed because of the cryptic ring.

- Description from Novelupdates

The male student, Fukai Nagamasa, ignores his studies for college entrance exams in favor of following the path to chuunibyou. As he fainted during night cramming session before the exams, he realized that he was transported to a parallel world as a feudal lord in the Sengoku Era. Not to mention that suddenly, he was marrying the sixth Demon King, Oda Nobunaga’s little sister, the one who was purported to be an unrivaled beauty?

Luo Lin Yuan was born delicate, with a big temper, a hard character, and a good face.

Yu Han is straight, good-tempered, and soft, and only sleeps three hours a day.

Yu Han didn’t want Luo Lin Yuan near him.

But Luo Lin Yuan wanted to be around him.

This is an innocent, sweet campus story in which Little Princess Luo went to great lengths to make friends.

Abstinent, Poor Gong x Obsessed with Cleanliness Little Princess Shou.

- Description from Novelupdates

A back-to-basics(?) monster evolution novel.