Hate Mate 

Emboldened by liquid courage, 20-year-old Bang Subin had thought it'd be a good idea to confess to his best friend, Nam Hyeonwoo. That in itself wasn’t a problem, except… Hyeonwoo was straight. The only thing Subin’s impulse confession did was cause a rift in their relationship. Fast forward three years, Subin is 23, and Hyeonwoo is back. A lot has changed with the flow of time, but for better or worse, Subin’s feelings haven’t. Can this precarious friendship ever blossom into something more…? (Source: Tapas) Note: Includes nine extra chapters.