C731 Oh My Youngest Junior Sister 26

"I need to get it back because without it, I might never have the chance to see him again, which could affect my life. It also means I can't save my brother, and eventually, he'll revert to how he was before."

"That's why he acted strangely after I left."

It's not as serious as it seems, but it was exaggerated on purpose.

As for his reaction, suddenly returning to the family