Manga Descriptions Tensei Shitara Warui Kuni No Musume Deshita On Manga Online
childhood friend (♀) gets attacked by something (♀), main character (♂) dies in crossfire. main character (♂) is reincarnated as the living weapon (♀) of the demon lord (♂->♀) that just killed him, while his childhood friend (♀) is apparently now the hero (♀->♂?). reincarnation + isekai + double(?) genderswap.