The Shiunji Family Children manga volume 1 featrues story and art by Reiji Miyajima and Reiji Yukino.

Arata Shiunji has never had a girlfriend, but with five incredible sisters and a younger brother, his life is far from lonely. Despite being surrounded by beautiful women every day, he begins to accept his days as a bachelor won’t be ending anytime soon. But one day, all that changes when his father reveals to the family that he and his siblings aren’t related by blood! Now all bets are off, and Arata’s future promises to be rather nerve-wracking indeed...

The Shiunji Family Children manga volume 2 features story and art by Reiji Miyajima and Reiji Yukino.

Having suddenly been confessed to by his (former) twin sister, how will Arata respond? And then there's his youngest sister Kotono, who can no longer hold back her feelings…As the other sisters grapple with their unstable feelings, the Shiunjis' forbidden love story accelerates further!

The Shiunji Family Children manga volume 3 features story and art by Reiji Miyajima and Reiji Yukino.

With youngest sister Kotone's declaration that she wants to marry her big brother Arata, the love story surrounding the siblings of the Shiunji family becomes even more complicated!  No matter who ends up together, it'll be a forbidden romance!

The Shiunji Family Children manga volume 4 features story and art by Reiji Miyajima and Reiji Yukino.

Ouka, consumed by worry, runs away from home, and Arata sets out to find her! Plus, as if youngest sister Kotono's affections weren't enough, fourth sister Minami also begins to show an attraction toward Arata…?