Why doesn’t Yuta go back in time and prevent his body from getting stolen? It must not be that important to him.
Today, Ito died, and the cat-spirit-ghost-thing told Yuta that Yuta had the ability to save her. All he needed was a strong enough desire to save “someone”, and he could travel to any time in the space-time valley. I don’t understand why he doesn’t just go back in time and save himself. That would solve two problems at once.