OK, either Tsuji forgot to lock the safe, or somehow opening locked safes is so normal for Chiyomi's mom that she doesn't think twice about it.
Ah- This is open...Where is everyone~?During hide and seek*Rustle*Maybe in here~?*Roll**Rustle*In heeereee~?Who's hiding in the taaank~?*Squeeeze*W-Wh...Why is it here?
No, I can't!
I can't look...Wait, too many!Ta-da ♪