Despite sacrificing his own life to protect innocent girls from an attacker, Shiinya Kazuya was granted a second chance in a world full of magic and swords, fulfilling his lifelong dream. However, he now referred to himself as Cain von Silford, an aristocrat's third son, and had to conceal his knowledge of his previous life on Earth. Blessed by the gods on his fifth birthday, Cain's exceptional skills and abilities proved to be a burden he had to keep hidden to avoid drawing attention. Determined to climb the social ladder and explore dark dungeons, Cain embarked on the ultimate isekai adventure. Trapped in a mysterious kingdom, the young boy held onto the hope of one day reigning supreme over all.