Dekisokonai Ouji no Nariagari ~Seikon Nashi no Dai San Ouji ni Tensei Shitakedo, Kondokoso Kazoku wo Mamoru Tame ni Saikyou wo Mezasu~

After losing his life in an accident, Kazuma finds himself reincarnated as the Ascalon Empire's third prince, Ares. He wasn't born with the "stigmata", the proof that one is royalty and gives them extraordinary abilities, however, he still received love from his family and spent his days in peace. Until one day, his father's first wife, Germa barged into their home, and looked at Ares in contempt for not having a stigmata. In the end, she even put his mother, Erina in danger. Realizing how powerless he truly was, Ares decided to protect his family with his own power. He decides to enroll into Ascalon Academy, a prestigious school where one's capability decides everything!