Hanaya no Nikai de

花屋の二階で

Prequel

novel

After Yuuta and Shuu reconcile and the children return home, new trouble is on its way. This time, said trouble involves the quiet second eldest brother, Akinobu, and the hot-blooded head of the house, Taiga.

Sequel

novel

Adaptation

manga

This time, the focus is on the second eldest brother in the family from Mainichi Seiten — the bespectacled Akinobu who wakes up one morning in an unfamiliar bed with someone most familiar and unexpected. This is the last in a series of stories: 1. Mainichi Seiten 2. Kodomo wa Tomaranai 3. Children's Time 4. Kodomo no Iibun 5. Isoganaide. *6\. Hanaya no Nikai de* Although not specifically "sequels", this is the order that the stories were written/published in.