Shiinya Kazuya, a teenage boy, was resurrected into a realm of magic and swords after dying defending young girls from an aggressor. A dream came true, indeed! Although he is now Cain von Silford, the third son of an aristocrat, he still recalls his past life and is familiar with Earth. On the occasion of his fifth birthday, Cain was bestowed with the gods' protection, but this turned out to be too good for him. Because of the strength of his stats and boosts, he must conceal his true prowess in order to advance in society and enter the deepest dungeons. As a teenager-turned-child is imprisoned in a lovely kingdom he didn't make but might someday rule, the greatest isekai adventure begins!