I'll Kiss You, You'll See.

"I got a perfect boyfriend that looks like my favorite character!"

Tanaka is a college student and an otaku. Suzuki is a guy who's got it all, and is Tanaka's classmate. One day, Suzuki steals Tanaka's first kiss and asks him out. While Tanaka has always secretly admired Suzuki, the pressure from the sudden confession puts him in a panic, and he turns down Suzuki. But Suzuki continues to steal kisses, and it gets Tanaka flustered every time. Tanaka tries to run away from the kisses, but then Suzuki tells him he'll stop trying to kiss him if he starts dating him?!

(Source: MangaPlaza)

Note: Includes one extra chapter.