The Cold-Hearted Wolf Has Come to Devour Me Again

I'm going to break the old you. His lips feel so forceful and hot, and refuse to let me go... For the first time in 9 years, Mao meets her childhood friend Yuto, who's turned into a cold man whose job is breaking couples up. Mao wants him to turn back to the gentle Yuto she remembers, but Yuto proposes a trade...

(Source: Goodreads)