Kyo Kara Maoh: Season 2, Vol. 8 - Region 1 DVD

Seraphine, who is after the life of the one that has the key to the box, reappears at the Covenant Castle and attacks Yuri and his group. Yuri and the others are overwhelmed by the immense magical power that has rain as its ally. Sensing that Yuri's in danger and wholeheartedly wanting to protect his younger brother, Shori sets free the power that he has received from Wolfram. That power, which became stronger in proportion to the strength of the warped love, involves both enemy and ally, resulting in a huge chaos that even threatens to destroy the castle.