I think he loves school swimsuit because he says "yahoo(うひょ~)" in lower right panel, so "Too-Much-School-Swimsuit" as you said or "So-Many-" is better.
His sayings "~~だらけの**大会!ポロリもあるよ!" is a set expression of Japanese web-site even if ポロリ is meaningless. There are so many sites that uses similar phrases, e.g. "ウサギだらけの餅つき大会!ポロリもあるよ!(Rice Making Meet of So Many Rabbits!)" for Eientei.
I stand out...Heretheycome! Heretheycome! Heretheycome!Wahoo!!Wa... Sanae's bathing suit...More like you don't care.No way.He's really pumped...Let's have some nipple slips too!Isn't it all right, Keine-sensei? The rules and stuff don't really matter!All right! Let's get The Not-Enough-Bikinis Swim Meet started!