I am looking for an mc with a device or a system and he can go to another and he tells his best friend (the best Friend needs to be a boy and no BL) and takes his best with him to another world.
He is looking for the blue bird in pokemon This is the nearest "thing" you are looking for.... And when i said "nearest", its like the gap of "Q" and "P" on your keyboard "Kou 1 Desu ga Isekai de Joushu" Hajimemashita