His House (2014)

Blurb:
Life isn’t easy for an orphan, especially when you’re as good-looking as Gangyoo. To survive on the streets, Gangyoo hires himself out to homely women in desperate need of a pretend boyfriend. Now in college, Gangyoo only needs one more gig to earn enough money to graduate and live a normal life. There’s only one catch. His new client is a man named Soohyun. And there’s only one problem. They hate each other. Being a pretend boyfriend has never been so hard. Little does Gangyoo know that his own seedy past will catch up to bite him . . . and Soohyun harbors a dark secret of his own.

Source: www.anisearch.com/manga/24845