User blog comment:B214/Kuoh Academy students finding out that Issei stays with the ORC girls and is dating Rias./@comment-24098614-20131215011722/@comment-16281343-20131215083007

Buut. That is if they do scout Gasper.

The two of them being there doesn't prove that the school knows Gasper is a boy.

And if they do know and go wild in the school saying that Gasper is a boy, no one will believe them since Gasper really do looks like a girl. Even Issei and Saji are fooled.

The others told Issei and Issei told Saji about Gasper's crossdressing habit since their is no point in hiding it from them since they will be interacting with each other frequently because of them being devils.