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!