The thought of never playing with her little sister again is too much to bare.
**Off to another world**
Yep that’s cool (isn’t that kinda the same?).
Lol imagine the parents, they go from almost losing one child for her to miraculously be healed, at the same moment their other daughter either dies outright or is never seen again. For both the parents and younger sister how devastating.
These isekai reasons need to be better thought out if Truck Kun isn’t going to be involved (or they’re a depressed orphan already).