I really like this one, but I might have to drop it. It's too stressful to read especially now that it's still on going. Read some SPOILERS, and it looks like the emotional rollercoasters just keep on going. Huhu.
He blacked out while it was happening, so he couldn't remember that he was calling someone else's name and that he was actually assaulted. He thought he just made a mistake because that's what the Professor told him and he couldn't remember otherwise.