Fools (2016)

Blurb:
Eunki’s always been an introvert, but he was never this jaded before. All the vivid excitement he felt as a freshman moving to the big city has faded into colorless lethargy years later. Now he mostly keeps to himself, only showing his face at the occasional meet-up. But at one such event, he runs into Jungwoo, a peppy young freshman who’s keen to make a good impression. Little does Eunki know that this eager hoobae is about to sweep through his stale life like a breath of fresh air.

Source: www.anisearch.com/manga/32328