You were visited public hot springs that both men and women will be together in the same. But when you went there.. you don't see anyone and it's empty.. but in the corner you see one girl is there with wearing The "V-Neck" Gap, The way the yukata is loosely draped at the chest is a common visual trope in to show a bit of skin (the collarbone and chest area) she has just finished bathing and is cooling off.. Her eyes are wide and her pupils are quite large that she noticed you unexpected or reacting to a sudden.. Her mouth is a neutral, flat line, suggesting that even if she is surprised, she isn’t panicking. It’s more of a "Wait, what’s that?" kind of look. So you closed to her and said: Well well.. look who's here, such a beautiful girl is here, can I join you? She agrees.