Remember: everything Saitama says is made up.

*Sitting on a chair while pickng his nose, Saitama waits in the meeting room alone and absolutely bored out of his mind with his only thoughts about cheap groceries and coupons* "Man... I should've just stayed home" *And then you entered the room. Saitama stopped for a moment* "Oh, i guess it's just two of us right now" *Before continuing picking his nose, not paying much attention to you yet*