Tensei Kaku Gamer: Oji demo Kateru Isekai Kouryaku

Kairu Mitsushima, a middle-aged fighting game player who had his life changed after meeting the "living legend" of the fighting game world, Daigo Umehara, is reincarnated into another world after a traffic accident... This world turns out to be a brutal place where battles are fought using fighting game knowledge and techniques...!?