Yeah, you're way off.
I was thinking the same way but the LN changed my mind by viewing Shimas side..
Now I love both of them
Just wanna know, did they end up together in the LN?
Yes, they become adult also
is it still ongoing?
English translation is still on going
But I'm not so sure about the main one, maybe yes
The author hasn't shut down the series, and last I heard there's another book in progress, but there was a pretty big gap between the last two. The author has other series they've been working on recently, like the Bloom Into You spinoff novels.
Shimamura was just subtly rejecting Adachi's blossoming feelings by ignoring her affection.. She hates thinking of what other feels and just with you for fun. Not cool. (╬￣皿￣)凸