Tbh I think the most likely way this will end is an open ending before any couple is confirmed where the MC just ends up admitting to himself that he also has feelings for Miyahara. The characters are so young that the manga won't go into a serious romance plot and I don't see this going into a timeskip and turning into a highschool manga either. Wouldn't fit the vibe.
The characters aren't young at all. They're the same age as the characters in BokuYaba or "the young witch wants to have sex!" They're just drawn young