Choegangui Naemsae

Your kiss smelled of lemons.

When Ga-Min steals a kiss from his sleeping classmate, Kang-Go, he’s positive he’ll never get caught. But what he doesn’t know is that Kang-Go has a unique gift — he can smell emotions. Now, Kang-Go’s on the hunt for the identity of his secret admirer, whether Ga-Min likes it or not.

(Source: Manta, edited)
Note: The chapter count includes 7 side story chapters.