Kim Jongin can't help being jealous, because well....it was in his blood, genetically infused in him since the day he was created. Both his parents were ers in their relationship and the only reason they managed to pull through was because they couldn't stand being jealous of seeing each other in another person's arms.   And Kim Jongin inherited that . He was jealous of Do Kyungsoo being so close to....well, to put it simply, the whole world