Kaibutsu Oujo S01E15 - Princess Visitation

Nozomi Kobuchizawa shows Yoshida and Murayama proof that Hiro has been staying with three beautiful women. They go to the mansion, each daydreaming what it would be like to be with Sawawa, Riza, and Hime. They confront him regarding how lucky he is to be under the same roof as the three girls. Since the three boys are so persistent in wanting to serve under the three girls, Hime agrees on the condition that they, along with Hiro, race through an obstacle course in the mansion filled with booby traps to get to her. Sherwood, Francisca, Reiri, Ryu-ryu, and Riza all try to stop them as well. Hiro was revealed to actually be a shapeshifter disguised in his form, so Hime freezes it to death using liquid nitrogen.