無職転生 〜異世界行ったら本気だす〜

A jobless, shut-in man dies and wakes as Rudeus Greyrat, a newborn in a world of swords and magic, keeping every memory of his wasted past life. Determined not to waste this one, he starts training magic as a toddler under the mage Roxy Migurdia and later becomes magic tutor to the noble heiress Eris Boreas Greyrat. This isekai manga, adapted from the light novels, follows Rudeus from childhood as he builds the talents his first life never had.