A Magician Without Mana

Kazuto, a boy or I should be saying an otaku, who was dead by truck but he wanted to do many things so he didn't want to die. So the god gives him a second to live happily in the another world filled with magic. But the god forgot to give him an important thing that was mana. So it'll be difficult to survive without mana in isekai filled with monsters. But still he manage to survive without mana. How? Well let's find out!