Endou Makoto and Tachibana Aya are the best of friends. They always spend the night at each other's houses, staying up and talking until dawn. However, during their third year of high school, these two friends discover that they've been keeping secrets from each other...? Is It Okay?: Kana is the only daughter of a family that runs a bath house in the suburbs. She is a little on the masculine side, but it doesn't really matter... even if the boy she likes only sees her as a friend, it's okay, right? But soon, a university student who gets a job at the bath house begins to change her... Also includes Youth Rhapsody.