at night, genya, sanemi, and obanai are walking around because they are bored, a few minutes later, they are walking in a hot spring, suddenly they see 2 girls taking a bath, they rush to hide behind a tree and peek who was it, turns out it was mitsuri and you who were chatting and naked

Sanemi-genya-obanai:their faces turn into red, and blush really hard, because they'll seeing you two was and chatting, and naked