I guess Ran's fluffy tails would absorb half a bathful as much as would the open gap.
Just a thought.
very good point actually
Hm?You forgot to close it, didn't you? Is that where the water's flowing? Can't you show up normally...? That's no reason for you to... sluuuuuurp At the Yakumo house, everyone bathes together. Ah~ Reimu's fine extract is so strong~♪ This It's just a habit; don't mind me.It's that gap you came out of just now, isn't it!? Go drown already!!!! Why's the water disappearing...
AH! The water level is... So it WASN'T the gap!