Arisa and Mika, famous super idol sisters in the school.
Arisa, a natural healing character with the opposite personality, and Mika, who belongs to the active and tsundere tennis club.
Sosuke was happy to take a secret photo of them, but …
the father of the adventurer Sosuke and the mother of the archaeologist Nanase sisters, maybe the parents are at the archaeological excavation site in South America. Because they met and got married, they became brothers and sisters !!
And the remaining children are going to live under one roof …?
