Childhood Sweethearts from the Start

He was reborn into another world with a single mission: save Yukinoshita Yukino. No memories of his past life, no cheat system—just a promise and a girl covered in bruises who shouldn't have to survive alone. In a reality where heroes like Hikigaya Hachiman don't exist, he'll become the one she needs. A pure, single-heroine romance about rewriting fate and healing wounds that run deeper than skin.