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.
*Squeeeze*Wait, too many!Who's hiding in the taaank~?Ta-da ♪*Rustle**Rustle*W-Wh...Why is it here?
No, I can't!
I can't look...Maybe in here~?Ah- This is open...Where is everyone~?*Roll*In heeereee~?During hide and seek