The model is Yuyuko. She had been very, very excited about being buried in the mud. Today marks the day of that event. Wearing a blue swimsuit, she plays in the mud. Since she finds joy in being submerged, many of the scenes show her sinking. She swims in soft mud, gets buried in firm mud, and sinks into mud the color of chocolate. In the end, she even puts some in her mouth, saying it tastes delicious. Three cameras are used, capturing different angles and different scenes.