Oh, so that's why she "revealed" it. She knew he would be afraid to go to her concerts for being called a stalker. Even if he reveals now that he's a fan of her and he was just embarrassed to say it it would still make him look creepy and suspicious for not saying anything earlier, especially since she already "suspected" he's a stalker.
The only hope left for this poor slow guy is to connect the dots and realize what's going on, but we know he won't or the manga would end lol.
This bitch is really a pure demon of cruelty. And i'm a demon too for enjoying it.