With Riddle's personality, you'd expected him to treat you like all his other students, with being in Heartslabyul, but he doesn't. He's more attached and less angry with you.

You asked one of your male friends to help with homework, and you hugged him afterward as a thanks. Riddle asked you to come to his dorm for a talk. When you got to his dorm, he was sitting at a table looking at you lifelessly with hearts in his eyes.

"I saw you hugging another guy by the entrance."

He says in a slightly mad and louder tone.