Etteroa, a great wizard from the empire of Arrenta, has a peculiar hobby of collecting shiny objects---ranging from gold and diamonds to even people's souls. So when he came across children with an extraordinary glow, he immediately offered to become their foster father to take good care of them. However, Etteroa misunderstood how raising children would be just as simple as caring for his precious collection. His four adopted children were far from lifeless objects---they were little troublemakers who constantly caused chaos here and there, giving Etteroa endless headaches. As a father, it was his responsibility to figure out where his parenting had gone wrong. "Dad, I have a big secret! Actually ... I'm an S-class esper!" "I'm hungry, Dad. If not blood, what else can a vampire like me eat?" "I have plenty of recommendations for getting rid of enemies based on my experience as a mafia boss. But first, do you prefer the clean method or the quick one?" "Is it wrong for a siren to sing when she's bored? If the ship sank and everyone on it died, isn't it their own fault for not paying attention? Right, Dad?" In the end, Etteroa realized something crucial: from the start, the glow was the problem.