Aya Mizuki, a high school girl working part-time at a secondhand bookstore that also sells adult goods, one day runs into Yuki Chino, an honors student from her class, right in the adult section. Yuki, who is highly respected at school, is surprisingly examining items for "stress relief." Sharing this little secret, their relationship gradually deepens. A high school girl-meets-girl story that begins with an unexpected encounter.