Umarekawatta <Kensei> wa Raku wo Shitai

Alta Schweiz, a boy who retains memories from his past life, is now the youngest knight in the kingdom. Previously known as Raul Isaulf, he spent his former life engaged in constant battle. Now, he prefers to work diligently but aims for an early retirement, seeking a peaceful and fulfilling existence in this new life. One of the duties assigned to him is to accompany the "Princess of the Kingdom," who is recognized as the strongest individual in the realm.