Is it gay? no.
But honestly I'm loving the set up of the super popular guy obviously likes girl, but she's oblivious because she's to busy pre-tending to like him. (But is actually falling for him).
Especially since I nearly died of awkward laughter when Chigira-kun says "Mission Cleared"
It is one of the first manga's in a while to cause me to truly laugh.

It's adorably sweet and while nothing really sticks out about it I think I might continue it just because of how wholesome it is.