I am not serious. I am called kouhai quite often, by one specific person. Still, weeb ;) (Also not serious, just look at my picture)
XD ooooo who's ur Senpai The only reason I thought u were serious was because of the formal wording TBH xD
I commonly speak formally. It's how I speak, beyond the hopes and minds of the illiterate. Still, sorry for any confusion :( No offense intended <3