I’ll put a read more here because my next sentences may have too many spoilers
I haven’t read the manga but I agree that at first he seems super arrogant but it’s cute how much he admires Onoda. Oh my goodness, the welcoming race in New Generation just tore me to pieces! How many more members they had trying out, how everyone was in awe of Onoda and he has NO IDEA how to be and the end is just heartbreaking.
Also, I LOVE Imaizumi’s development from start to where it is now. Like, he starts out SO SELFISH and single minded only become actually a really good teammate, friend and eventual senpai.
YES, I love HakoGaku! I did not like Arakita at all at the beginning (at least during his flashbacks because he’s so annoying) but now he’s one of my favorites, especially after he saves Onoda and Manami from the pack (which that whole idea was hilarious!)
Yes, the OVAs after the credits are priceless, I laugh so hard at all of them and watched the summary movies just to see more of them.
Did you happen to watch the OVA “Spare Bike”? It’s so amazing!