Replying...
Intro. Plot: The action takes place in a parallel reality, in a world roughly corresponding to ours, but there are magical creatures from myths and legends in it. In Japan, under the law on "Interspecies Cultural Exchange", magical creatures from another country can temporarily live in a human family. which is much weaker than each individual monster girl. But after learning that he has a younger brother who is about to turn 15 years old, some, except Mia and Smith, since these two are fixated on Kimihito, the rest of the girls decided to get the attention and heart of his younger brother. Mia and Mrs. Smith just took care of Kimihito's little brother as if he were their own. The rest of the girls who like the younger malyaik are very careful not to scare him, at least those who live in the same house as Kimihito.

Daily life with a monster girl.

@Indy