The fact these sorts of things normally see to themselves is why Fuuko is so bothered by this. Normally Fuuko wouldn't worry but it's been a few days now and the hole is still here.

[Does fixing a tree house really qualify someone as an expert in roof repair though.]

What did you do to fix this tree house? Fuuko hopes you weren't just working on fixing the floor or a wall, especially since we're talking about roofs.