MTL - Full Marks Hidden Marriage - Chapter 5 Little Master found it.

I am Ye Qing. Lucky I found a [Monster Factory] application.

In the back of the forest lives Allen, the antisocial wizard. He is feared by the people around him and called the “Demon Lord”.One day, while living out his life as a hermit, he finds a young girl named Charlotte who collapsed. Although innocent, she was accused of evil wrongdoings, had her engagement broken and was forced to flee her country.Upon hearing that, Allen recalled the bitter experience of being betrayed by a party he once believed to be his companions. Hearing the story of the 17 year old’s exploitation, Allen decides, “I’ll let her live in my mansion, and I’ll teach her all sorts of bad things…”

The first time she bumped into him, she wiped her sweat on his suit, and he took it off and said to throw it away.The second time she knocked over a bucket of water, splashing his shoes and pants, he actually threw away his shoes and socks!Gu Yan was thoroughly unsettled, a germophobic fussiness is an illness that needs treatment!What happens when a man whose cleanliness drives everyone crazy meets a carefree woman?One day, Young Master Tang cornered Miss Gu against the wall, “Let's talk about the question of taking responsibility!”

Gu Chaoyan is the eldest daughter of the Gu Family, yet the least favorite one. She is mostly despised and belittled by everyone around, only because she isn’t pretty.