Having arrived just outside the open-air hot spring, Tsuki Anmitsu is suddenly forced to change into an extremely tiny bikini. With no way to conceal her figure, she trembles with anxiety and embarrassment as she walks alone toward the gathering of amateurs. Upon arrival, she finds numerous amateur men already assembled, eagerly awaiting her. Mesmerized by her extra large breasts, they approach her one after another. During the inn's banquet, she casually deepens her interactions, later enjoying private moments with the amateurs. But this is only the beginning—new developments still await.