User blog comment:B214/Kuoh Academy students finding out that Issei stays with the ORC girls and is dating Rias./@comment-80.116.104.237-20131214173356/@comment-9339850-20131214230948

Issei has pretty much already shown them Rias' nude body back during the time of the class observation day. He molded her body subconciously when they were supposed to make something with the clay they were given