Just Love, the Monster.

Synopsis

Reiji Kuze is the son of doctors and the new transfer student in his last year of high school. As someone whose socioeconomic background and academic grades are in the top 98th percentile, Reiji immediately stands out like a sore thumb in his new school. And in high school, standing out means you will be targeted. Presumed to be a delicate prince swimming in cash, Reiji gets picked on by the third strongest person in the school... and beats him and his entire gang to a pulp without breaking a sweat. As if Reiji didn't stand out enough already, he seems to have caught the interest of the king of the hill, Akira Ohara, the cat-like lone-wolf that nobody can seem to tame... (Source: Fantasista Inc.)

Anime adaptations