Tensei Shitara Budouha Reijou!?: Koishinakya Shinjau Nante Murige desu

A former delinquent and skilled brawler known as the "Crimson Rose" is reincarnated into a game world where survival depends on forming a romantic bond with one of the yanderes. Now reborn as a heroine from a respected family with a gentle appearance, she struggles with completely unfamiliar social expectations. Her past life left her with no experience in romance, preferring conflict over conversation. To stay alive and assist in an ongoing investigation, she must attempt to form a relationship, though she remains unaware of her new predicament. Charming and loved by those around her, Serina, the earl's daughter, begins a journey to find happiness in this unfamiliar setting.