[s-] Spongebob is in the [4] bathroom of the [-ai] high school where he is having a 赛 competition with a 贝 shellfish (who is also from under the sea). At one end of the bathroom is a 宀 dollhouse, and in the middle is a wire mesh. They try to throw ハ fins over the wire mesh to see who can first hit the 宀 dollhouse. It's a strange 赛 competition, and the high school students stand at the entrance, watching.