Zero Sugar Love

Do-Jun has a crush on the affectionate and mature college senior Han-Eul, but Han-Eul is always accompanied by the bustling popular kid Shin-Woo. Do-Jun, who is reluctant about the seemingly frivolous Shin-Woo, tries to approach Han-Eul, but Han-Eul is a heterosexual to the core, and even Shin-Woo finds out about his feelings for Han-Eul. But what's this? Shin-Woo suggests to Do-Jun that they should be partners since they both like guys anyway. Do-Jun is conflicted, but ends up in a relationship with Shin-woo, who is honestly a "good guy." Will Do-Jun, who suddenly becomes the best friend and sex partner of his unrequited love, be able to maintain a clean, selfless relationship?(Source: Lezhin, translated)