Isekai Quartet 2 X Male Oc

Previously on Isekai quartet David a half human half machine was teleported to another world or continent and spends most of his days at school even though he was homeless and grew up in a city, he managed to make new friends who are human and some who are not, nowadays he wonders and ponders of when he will go back home. But until then he is free to let loose and relax