Ippaku Futsuka Touhikou

A young man named Kaito and his childhood friend, a girl named Yuki, decide to go on a two-day, one-night trip together. They have been close for years, but their relationship has always been strictly platonic. During the trip, they find themselves sharing a room at a hot spring inn, and the close quarters begin to blur the lines of their friendship. As they spend time together, old feelings and new desires surface, leading to a night that changes everything between them.