That's good, at least.

... Inves are... from the Helheim Forest, controlled by Overlords. Most of them were their equivalents of human before the forest changed them. They eat the fruit that grows there. And if someone from my world should wander in there and not have a specific item, the fruit is difficult to resist.

That's what happened to Yuuya, the leader of my old dance team. And he turned into an Inves that looked a lot like this. Kouta didn't even know he killed him for a long time...