MTL - My Beautiful Teacher - Chapter 1954 Taking this as the boundary

Xue Xi is forced to fall in love at first sight with this dangerous man on their first meeting. With death being the only other option, she makes the first move:

Before the disfigurement, everyone loved Ling Chunan. After the disfigurement, Ling Chunan became a plague that everyone avoided. He was held on captive by his own agent afterwards because he was so ugly now, desecrating his love. Finally, Ling Chunan chewed himself to death because he was starving. After his death, a thing that claimed to be the counterattack system 098 found him.

A long time after, a certain counterattack system of a host with a 100% success rate posted a message in the System Forums.

《Emergency Help Request, my host is a masochist! He won’t be happy if every meals doesn’t have meat, and if he doesn’t have meat to eat, he will start to gnaw himself! How to treat this illness?!》

Great God : No need. I have a fast recovering ability. I will let him bite me.

- Description from Novelupdates

Shen Weiyi has a younger, boy-next-door boyfriend whose allure lies in his height, long legs, and strong torso. With a wild mind and a talent for flirting, the eighteen-year-old Jiang is impulsive, fun-loving, and fickle, exhibiting both innocent and wolf-like traits at the touch of a button. Beloved by countless girls, he always thought Shen Weiyi, who would do anything at his mere call of 'sister', would forever indulge him, only to find she suddenly doesn't want him anymore.Breakups are breakups; whoever regrets it is a dog.Shen Weiyi, once red-eared and compliant to his every whim, now won't look back, leaving an eighteen-year-old Jiang's genuine liking turning into a resolute declaration of disinterest. 'Jiang,' she says, 'I date for happiness, not for extra headache.'Later, a desperate Jiang tries everything for her, getting injured in the process and lowering himself to the dust, only to see her blooming in another man's arms, which drives him to a jealous rage.Sheng Ting, the genius of the Z University, untouchable and seen by everyone as the embodiment of purity and restraint, had decided the names of their unborn children upon his first glimpse of Shen Weiyi.[Childhood friend VS Sudden love, not seeking the adoration of the whole world but asking to be your one and only exception in life.]