Someday I'll Fall for You, Vol. 2 by Tomo Kurahashi

A story of childhood friends who realize they want something more.

Kazuma and Chiaki have been brought up like brothers, but everything changes when Chiaki realizes he has feelings for Kazuma.

Childhood friends Chiaki and Kazuma have finally started dating, and the smallest circumstance propels them to take the next step forward into physical intimacy. With that line crossed, it’s hard for them to keep their hands off each other, but at the same time, Kazuma comes to a frightening realization: they cannot tell anyone about their relationship. Will Chiaki and Kazuma be able to maintain what they’ve nurtured together?