Manga My Girlfriend Is A Villain

The story tells about a guy who is the future head of the clan, who is gradually declining. All that a guy is interested in is to live his life calmly and comfortably, to be a normal person. But in his life, everything is turned upside down when his grandfather enrolled him in a school for aristocrats. Arriving there, he was mistakenly assigned to the female class, where their bullying and torment brought the guy to an absolute unwillingness to study.