The models are Suzuka and Ren.

The two of them, wearing bikinis, play around in the mud pit.

Since Suzuka is a model who cannot show her real face, the shoot starts with her already submerged in the mud.

Guided by Ren's hand, she is pushed under the mud and stepped on. They mentioned that today's mud felt like chocolate.

Then, Ren splashes mud onto her.

Next, it's Ren's turn. She also takes a dunk. After doing it several times, Suzuka climbs on top of Ren.

They challenge each other to see how many seconds they can stay submerged in the mud. After that, they attempt to swim in it.

Then comes a game of rock-paper-scissors where the loser gets dunked into the mud. They also splash mud at each other playfully.

Finally, in the closing scene: on the day of filming, Japan's very first true-or-false quiz game by mud enthusiasts was held. A glimpse of that event is also shown.