Ep. 1: Haruka and Yuu begin high school with a secret kissing pact to preserve their bond.

Haruka Takayama and Yuu Sonoda enter high school as inseparable best friends. As the academic year progresses and they expand their social circles, Haruka becomes anxious that her unique connection with Yuu will fade. To maintain their special bond, Yuu proposes they engage in a distinctive shared activity. Haruka suggests they secretly kiss each other as a tangible proof of their exclusive friendship. During one such intimate moment on the veranda, the pair becomes trapped inside an empty classroom. They are forced to navigate a significant gap between the verandas to reach the adjacent room, testing their resolve and the secrecy of their arrangement.

▶ Watch on Crunchyroll