Some guys are missing the point on all of this. First of, they are middle schoolers, second, the focus is Ichikawa not Adachi, it's supposed to reflect how Ichikawa cares a lot about his feelings. And third, this is not some drama, this will make Adachi and Ichikawa have a better friendship, which has been building up for a while now, so this event acts as a climax where they recognise each other.
Less hate and more paying attention.