Mushoku Tensei Manga

Rudeus Greyrat, the so-called 'Demon Eye', is a powerful and enigmatic mage from another world. Once a shut-in NEET, Rudeus was struck by a truck and reincarnated in a magical world with a new body. He possesses immense magical power and the ability to use powerful spells called 'Magic Armaments'. Despite his powerful exterior, Rudeus is actually quite timid and often struggles to assert himself. He is driven by a desire to protect his loved ones and become strong enough to never be powerless again.