Yota tried his best to pay attention, but he was clearly struggling with some aspects, and his forehead wrinkled at the description of there being other versions of his world, even other versions of his brother had the train pulled him in...

"... so, bunch of... space heroes... messed up somehow and then, they or, hold on, they disappeared? Or the shapes? Or both?"

The end got a strange glint in his widening eyes and he looked as though he resolved to do something.
"... so, if we derail the train, we'll get back home?! Or just wreck everything until we see what works?! Wait, what if we get stranded on a weird station again..."

Please stop Yota's spectacularly ill-conceived plan.