Wakana meets the twins Kuriru and Moruda in the lead-up to a summer festival in Atami. But when they find the festival costumes covered in mold, Wakana's sleepless nights might just save the day! How will an incident at the festival change the dynamic between her and high schooler Kyusho? Then, Wakana's love of hot-spring bathing leads her to check out a prestigious inn, where the proprietress seeks her aid in restoring a traditional doll.