Gakkatsu! Season 1 Episode 10 Do You Bring Your Umbrellas When There's a 20% Chance of Rain? ( Air Date 2012-06-05 ) Genre Comedy, Animation category. Overview "In a fictional school, "Tender Tank" Rareko is constantly opening absurd yet strangely enthusiastic debates, this way creating a lively classroom life. Bringing up tremendous themes, she and her classmates exchange words like sword-strokes, and here and there even a profound remark is slipped in. Fun and informative debate comedy, packed into only five minutes each time.".