Under a radiant sun, shy junior Haruka Suzumiya confesses her feelings to Takayuki Narumi, the boy she looks up to. He reciprocates, and they begin a relationship with encouragement from friends Mitsuki Hayase and Shinji Taira. Life seems perfect—until disaster arrives. The group faces an unexpected crisis that shakes their trust. One of them falls into a deep coma, an unwanted fate. Three years pass before they recover, and their sudden return challenges the strength of these friendships. Their bonds are deeply tested today.