"We won't break this relationship for the rest of our lives."

After a certain incident, high school student Sakaki has been at the mercy of his friend Nishi. Although Sakaki has accepted this relationship, he doesn't feel relieved. While Nishi wants to keep Sakaki all to himself, Tachibana appears between the two of them wanting to be friends with Sakaki. This is a triangle love story of overlapping feelings.

(Source: Kodansha, translated)