But he's saying it's perverse of her to get turned on by that. I agree with him, though I do know that the perverted Homura pool is normally her sniffing panties or spying on Madoka.
Anyway, the artist says this is Madoka's special technique 「小豆攻撃」 or Azuki Strike. I think it's referring to something else since he also mentions オギプルギスの夜 which is also the exact title of this Nico Nico video, which is just audio but has a load of Madoka adverts underneath. Or have I just missed some well-known fandom joke?