Can't go anywhere after defeating Scurrying slirrup

[Shieru26]

After killing Scurrying slirrup, I walk aimlessly in the game. I've already checked every rooms in main school and junior school. I still find nothing...except normal monsters..
Anyone kindly give me some advises. please

[Spiky Caterpillar]

Look around on the bottom floor; if you need supplies, they can be retrieved from the third floor storeroom (select to expose.)

[Shieru26]

Thank you I have found the supplies.

[ataraninja1]

I am having the same problem. I beat the scurrying slirrup and then we went through a thing where the girls asked where the monsters were coming from, and I can't figure out where to go from here. I have searched all the rooms several times but the monsters just keep respawning. I'm completely stuck.

[Spiky Caterpillar]

Return to the main school and continue down to the first floor; the junior school is a side dungeon.