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so this action fantasy with highschool kid whos dad was a legendary player? fighter? pioneer? of i think when gates or monsters started appearing but then his dad got betrayed when he was sick and now the boy like works illegally in fighting monsters n stuff. but then he meets this half-elf girl from a prestegious academy for players? fighters? that kind of thing and thats about all i remember... please help me find it!! （/TДT)/