Mononogatari Episode 8 -

"Tsukihi Phoenix, Part 1"This episode is infamous within the anime community for the "toothbrush scene".

Karen Araragi asks her brother Koyomi to introduce her to Kanbaru Suruga. Koyomi agrees on the condition that she win a "test" of endurance—brushing her teeth for five minutes. Mononogatari Episode 8

Hyoma and Botan share a "date" of sorts, which triggers intense jealousy and "daggers" from the protective Yu. "Tsukihi Phoenix, Part 1"This episode is infamous within