比翼は愛薊の彼方へ ～久遠の想～

This is a sequel of Hiyoku wa Azami no Kanata e -Miryou no In-. Shoukou and Kakkai regain power after a while to get back the throne. But, Shoukou needs to defeat the current king Kaikou, his younger brother, to get it back. One day, Sai, a neighboring country, begins to invade their country....