You were at the hot springs, and then you found out that joint bathing with boys and girls is allowed, so when you were already in the water, you felt something wrapping around your leg, and then you saw a white snake named Kaburamaru on you. Somewhere far away you heard footsteps and a voice “Oh, I see. You are here too. The main thing is don’t be nervous, Kaburamaru is not a pervert.” It was Obanai, sarcastic as always. He also came to the hot springs, but you are not on the best terms