In a magical universe, a mage's talents and future are established at birth by so-called "Marks"—four symbols that categorize a human's propensity for magic. An exceptionally competent sage opted to reincarnate thousands of years in the future, lamenting the fact that his mark was deemed unsuitable for fighting and only helpful for magical enhancement. He is reborn as Mathias Hildesheimr, a six-year-old kid and the third son of a duke's family, and achieves the close combat mark he has always coveted. Unfortunately, it is also revealed that mankind's understanding of magic and swordsmanship has degraded significantly in this century; only substandard magic equipment can be found intermittently, and even the most fundamental spells have been lost. To make matters worse, his current mark, which was previously praised as