Proud of Komura-kun for taking the initiative to hold her hand and express his feelings. That being said, I'm pretty sure Mie-san is going to have to take the initiative if these two are ever going to kiss. It's honestly kind of surprising to me how often they've casually touched, like holding each other's faces in this scene and when he was doing her hair a few chapters back (Komura-kun freaks out about it every time, but he still goes along with it). Also, I'm still shook about the fact that they're apparently 17.
Edit:
@OmniscientOnion Nvm I just realized I got these two confused with another young-looking manga couple (from Kubo-san wa Boku Mobu wo Yurusanai) whose ages were recently revealed! So, Komura-kun and Mie-san are definitely as young as they seem (confirmed in middle school).