When I saw your au looked like shinobu and kanae backstory I already knew what was gonna happen, yet I still cried in the end 😭 The original Shinobu and Kanae ending is already sad but this is even sadder 😭😔
For those who doesn't know the hand gesture I think it means like "don't breath it in" bc in the manya UM2 can make ice breath or ice smt so it'll he hard to breathe.