He decided that Erika would be more comfortable naked.

The challenger looks at Erika for a moment and decides that the leader will be more comfortable sleeping without clothes - after all, they might get sweaty or dirty.

First, he removed her zōri sandals, then her tabi socks. He carefully set them aside. Then he carefully untied her obi (belt). This caused the kimono to open further, revealing Erika's body. He took a closer look and saw that instead of underwear, she was wearing a nagajuban. He carefully pulled the belt out from under Erika's body.

He drank and took more photos of Erika sleeping. Before he decided to remove her kimono, he folded the belt and placed it on top of the rest of the pile of clothes.

He carefully stripped Erika of her kimono and Nagajuban. He folded her clothes and threw them into his backpack. Erika, now naked, was still fast asleep. So he took a few more photos, then lay down next to her and took a selfie.