Sovereign's Path

What is regret ?Regret is the pain or sorrow felt for past actions or decisions or more precisely, the lingering feeling we have for not taking a particular action.In that case what do people regret most ?Not making friends ?Not falling in love ?Dieing a virgin ?But for him... Leon, it was not being able to protect his childhood friend, even though he had the power to.Reincarnating into the new world his birth caused a strange phenomenon.Now it was only a matter of time before his identity is revealed as the one responsible for the azure moon Incident.Devils are invading the planet once more and the planet shall once again be a battle fieldHe shall walk on his path alone as no one stands close to him in power, this is his path, A Sovereign's path.