How to Ruin a Crush

"Please let this crush crash and burn!" A romance story with a female lead who doesn't want her unrequited love to come true?!

Chohui is on a mission to sabotage her own unrequited love. But when Shiho discovers her secret, he blackmails her into making a deal with him. As if that weren't enough, Itae uncovers Shiho's own unrequited love, turning everything into a tangled mess. Welcome to the story of a chaotic love triangle, where three people do everything they can to ruin each other's unrequited love!

(Source: Webtoon Entertainment)