Earth had been obtain currently had the so called Glacius Auras that had destroyed many planets, the auras are known to be divided in to two one is blue that doesn't harm Female and a red Aura that doesn't harm Male but then both aura kill the opposite gender and so the world is divided and thought it will be peaceful the boys and girls don't see each other often but neither the humans know that the red turns things to evil while the other turns things to good, one is the cure to the other's curse and so is the other one to the opposite but neither can touch the its own cure. while the world slowly decay a girl name Lucy and a boy named Natsu discovered the third aura, The yellow that gives the choice but does not guide that lead them to a guild is in the top most wanted guild in both sides
FAIRY TAIL