They're so corny that when there's a big moment for either of them the other one makes this whole grand celebration/acclamation out of it like they'll point to each on the stage and go like "That's my BOY/MAN"
-every time they on a date torao picks and drops haruka off in his car and sometimes when the whole date or outgoing is over haruka just lingers there in Torao's car when Torao's parked bc the car provides this safe calming necessary space to haruka and he relishes in that quiet and Torao's presence is as much of part of that as the entirety of it and i think they just do well silent communicating as much as they do well outwardly
-when they fight torao often talks first but haruka apologizes first bc Torao's awkward around apologizes but eventually comes around for haruka
-in case of zombie apocalypse haruka'd be the one begging torao to kill him and torao'd be the one to lock himself up with haruka
-their sleeping habits are amiss bc both will sleep close to eo (mainly intiated by torao bc hes corny) then both wake up on the furtherest ends of bed nearly rolling off bc they both naturally hate sharing a bed and need the space lmao
-torao gets off flirting with others bc he's a whore like that and haruka goes livid and gets aggressive with publicly demonstrating he 'owes' torao and its an underminingly powerplay for the both of them but everyone hates their guts

Sorry if the hcs are dog ass but hey you gotta admit.. i'm jorking it