Baburasete, Motto

Amamiya Kiri may seem like a diligent honor student, but the truth is that he's very insecure, and he can't stop sucking on a pacifier when he feels anxious. Kiri used to be able to enjoy his pacifier time in secret in his dorm room, until he started sharing the room with Enami Yukimura, a pleasant and cheerful junior. Then one night, Yukimura sees Kiri sucking on his pacifier...?!

(Source: Libre, translated)

Note: Includes one extra chapter.