
He somehow knew Haruomi cause he flinched when Haruomi introduced himself.. and he also said that Haruomi was full of empty promises.. maybe that guy was an ex? not possible cause Haruomi didn’t recognise him.. aaaa I don’t know but you better don’t cause any drama! ┑( ̄Д  ̄)┍

Oh, I made up a theory. I didn’t check raws so no official spoilers but...
He could have been a childhood friend, they made a promise to be the only one the other will ever love or something like that. Or maybe to always stick together. Or never forgetting each other haha, basically my whole theory revolves around them being child hood friends (● ̄(エ) ̄●)
AAAAAAAAAAAAA THEY FINALLY SAID IT !! AAAAAAAAAAAAAAAAA