Mmh, I feel conflicted, is not a bad conversation, but it kinda highlights their cluelessness and I wonder if it was worth spending an entire chapter on it rather than a couple of panels.
I'm not normally a fan of arcs like this but it's actually done quite well, helping tomo realise his feelings more, plus they've still made more progress in the last 5 chapters than kazuya has made in 300+ 😮💨
I just noticed that end credit page mentions 12! (cm) - he's lucky he doesn't need to grow factorial 12 (12!) cm taller - that'd have been a considerable effort.