In the serene town of Sakuranomori, a close-knit group of friends faces a bittersweet parting as Sana Hidaka prepares to leave for bustling Tokyo due to his parents' plans. Despite the distance, Sana believes in the enduring strength of their bond. Years later, a 16-year-old Sana returns home longing to recapture the past, only to find that time has woven complexities among his friends. Secrets and burdens test their once unbreakable connection against a backdrop of looming shadows in Sakuranomori.