Isshou Hatarakitakunai Ore ga, Classmate no Daininki Idol ni Natsukaretara - Vol. 1 Ch. 6 - Those who know the secret.

[dumamya]

that a guy?

 

[LARGames]

Please be an actual girl.
Please be an actual girl.
Please be an actual girl.
Please be an actual girl.

 

[booterror]

Last panel summary:

 

[Tap2]

It's so weird the mangaka thinks it's even remotely plausible for the MC to think "at least I think my best bud is a guy, even though he looks like a girl".
When they have phys. ed. on the curriculum? How?