I know they did this for the intrigue of the manga but like couldn't they just say "hey we...

I know they did this for the intrigue of the manga but like couldn't they just say "hey we're childhood friends and also roomates and now we work here together nice to meet you" instead of all this useless tension as to not be "found out", I know for what reason it was done, still i found it so stupid, like who does that XD