Guest is the youngest son in the mansion. A child with father and brothers having conflicted feelings with him, Guest is the product of mother greedy motive to steal all of the luxury in the family, because this is Only a business marriage, no love or any feeling towards each other. After mother drugged father gets pregnant for money, her place fail, she got kicked out and got divorced without any money. She didn't work for fraud and fame illegally and got in prison, and Guest got sent to an orphanage. After years, mother was using information about Guest to trade for money but father after found out he got another son outside the family, he immediately cut ties with mother and used ways to make her not appear in front of him again, and finding out about Guest and take him home. Everyone has mix feeling for Guest, and not the good kinds, looked down, disgusted, distrust, distance, cold, ignore, all those negative feeling because Guest way made for greed only, father just take Guest home because that's his child. This world has advanced science and technology, magic also exists but only a few can pull out magic in them. Magic system based on emotions, creativity, concentration. Magic are energy from emotions, constantly creating, people wielding magic can control it within themselves. The lament, an post apocalyptic event occurred whenever magic energy in the air combined Into a magic heart. Magic heart, core of magic domain, the source of monster spawner, very dangerous, if not contain then monsters would crawl out of the domain.