Эпизод "Gate of Flesh, 2007". Вся информация о нём на KinoClever

Gate of Flesh

The whole class went for a sudden trip to Kyoto. After an incident where Maki attacked Akeno, Sun apologizes to her, but Akeno issues that she's interested in Sun's mermaid body and asks her permission to investigate them at bathroom. Unknown to them, Nagasumi and Mawari misheard this conversation and issue an investigation of their own.