Of course it rains on school events and play dates. Water trouble is a common occurrence once a day. Ayaha Umemoto, a high school girl with a 100% chance of encountering a water accident, is asked by Azuma, a science-oriented boy in her class, to help him prove his case so that he can save Umemoto...? A handsome observational romantic comedy in which you can't help but fall in love with a watery, cutthroat science-oriented boy.