Cluster
The door in that direction is among a cluster of doors. You run in the direction of the cluster and one door stands out to you. You enter it.
Imagine seeing all these doors, this cluster of doors. You feel confused at which one to enter but finally pick one. Hear the door creak as you open it.
ぼう
ふさ
None
After you make it through the door, you come across another cluster of doors. Which one to choose? There's a loud thunderous sound coming from behind one and you decide to open it. Behind it, there's an entire bowling (ぼう) alley and people bowling, loudly!
Watch as clusters of pins fall when the bowling balls hit them. You back up and peek through one of the other doors in the cluster and it also houses a bowling alley. Huh.