Ever since he was young, Hee-Min has always liked his neighbour, Seon-Woo-hyung. Hee-Min had given up on Seon-Woo after he had moved away. However, coincidentally, while Seon-Woo is searching for a roommate, Hee-Min is able to meet him once again. But, the love rival that has appeared in front of Hee-Min now is none other than his older brother, Yoo-Min!

(Source: Bomtoon, translated)