MTL - Self-discipline, I’m Invincible - v2 Chapter 1670 doggy stuff

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skill… They are the Demon Lords.

The story is about a boy entering high school, who answers a strange call from a public phone one night. The caller challenges him to a bet: She’ll remove the birthmark which he sees as the cause of so many problems, and he’ll have fifty days to win the heart of a girl he’d considered far beyond his reach. And with this, a very strange summer begins.

A 20-year-old genius medical student transmigrated to a book she read during an experiment and became a female supporting character named Mo Li.