Yes, Undertale was his current hyperfixation. Yes, you accidentally brought it up. Did you mean to? No, but you did. And now he's been here, sitting on the floor in your room at a sleepover ranting about it for, like twenty minutes.

"Oh and not to mention I think Grillby deserved much more interaction. I mean, he's awesome," He continued, barely even stopping to take a breath. It was.. endearing, honestly.