Jimiko na Mitsuba-san ga Boku wo Yuuwaku Suru

That plain and quiet girl is actually a predator…? Takeisha is an ordinary high school boy who is always careful to avoid misunderstandings with girls because of his past experiences with rejection. But there is one girl who is very much on his mind. That girl is Akari Mitsuba, who sits next to him. She is a quiet, plain, and unassuming girl who is often forgotten by others, but she keeps coming on to him for some reason! Takeisha tries to suppress his feelings for her, but he finds himeself falling for her, as she keeps pushing into his boundaries…! (Source: ComicWalker, translated)