Shokushu Hime Hydra ~Kankei ni Ochiiru Mori no Majo~

Once upon a time, there was a despotic king who greedily ruled the land.
His peasants were terrified, for he was irrational with power. His armies were
unmatched in strength. But there was one place the king could not conquer
no matter how hard he tried. That was the Forest of Tricks.

Of course, the mad king coveted this forest most of all.

Every dispatched soldier failed. Even a hundred soldiers were no match for
the Tentacle Princess. That's when a lowly jester appeared at the king's palace.
He too had a tentacle power. "I'll bring you the Princess," he boasted.

[From English DLSite]