Inshoku no Kouketsu Oujo ~Kedakaki Kokoro o Kudake!~

"Our enemies of the West are attacking!"
The news was delivered breathlessly to Queen Yuria, who saw a chance to be rid of crown prince Zairu. She appointed him captain of the guard and sent him to defend the borderland. As expected, a vicious attack came, and Zairu was unprepared.

His final moments were filled with hatred for the woman who had sent him to his death, and at that moment a figure appeared.

"Would you sign away your soul for a chance to live again?"

Yes. Yes. To live and take revenge on Yuria, he forged a contract.

Zairu gathered his army and slayed the attacking forces in an instant. He then marched home--a march of war--and stormed the castle, capturing Yuria.

"Your body will atone for your deviousness," he said venomously.
And the tentacles began to creep.

[from DLSite English]