Peach Boy Riverside manga volume 8 features story by Coolkyousinnjya with art by Johanne.

The true identity of the black harefolk turns out to be a former overlord whose powers were sealed away by Frau! When the overlord absorbs an ogre horn, he powers up, dragging Frau into an intense battle. But then a savage-looking Sally with a peach mark in her eye arrives?! The battle with the overlord threatens to pull even the heavens into the fray before reaching a shocking conclusion!