now that's some potential :D :D :D
but then, letting a stranger in your house without asking for identity is a bit dangerous, seems like Japaneses have higher level of trust than other parts of the world
unrealistically dotting parents... i'm sure people will just kill him right away when they see him casting growth the first time, leaving kicking him right out of the house the second choice. Heck, if that's not demon stuff I don't know what is, and it's not like they have any bonding time...