Watch Tensei Kizoku, Kantei Skill de Nariagaru Online

An ordinary salaryman dies one day and is reborn as Ars Louvent, the son of a noble. Although he isn't talented in magic or swordplay, he does have one skill that no one else possesses: Appraisal. Using this ability, Ars can determine a person's current strength, how much potential they hold, and where their talents rest. This skill is especially useful in the present situation of the country. The government is corrupt, revolts occur more often than not, and nobles far and wide are strengthening their fortifications in preparation for an all-out war. With this in mind, Ars realizes he too must prepare by gathering talented people. From a persecuted foreigner unparalleled with the sword, a slave with an unknown talent for magic, to a timid boy with an unquenchable thirst for knowledge—Ars begins to surround himself with people to support him, aiming to create the most powerful territory.

Teenager Shiinya Kazuya died while saving young girls from an attacker, only to find himself reincarnated into a world of swords and magic. It was a dream come true! Though he remembers his life and knowledge of Earth, he is now Cain von Silford, the third son of an aristocrat. Being granted the protection of the gods on his fifth birthday turned out to be too much of a good thing for Cain. His stats and boosts are so powerful, he must hide his real abilities to climb the ranks of society as he descends into the darkest dungeons. The ultimate isekai adventure begins as a teen-turned-child is trapped in a beautiful kingdom he didn't create, but might one day rule!