This story is about the Shinamoto Siblings, who love themselves more
than anything else. This story is also about the mysterious Aisato
Siblings. Because these two sets of siblings are similar, it's natural
that the boys and girls are friends with one another. Even though they
may seem to think "only of themselves," their life motto is that "those
of a flock must stick together".
It seems that these two sets of siblings give off an otaku-lifestyle!? An every-day adolescent-type comedy!