I have prediction, since of previous episodes, it showed how Enji and Rei treated Touya, I’m guessing because of Touya’s death they went through a spiral of guilt and sorrow. So when Touya is proven to be alive, they immediately try to fix things but Touya snaps and reveals some things, and pushes them away. Wouldn’t blame him for doing so! Rei basically told Touya he isn’t her son so 🙃