Bad Chemistry

Mikage, a rabbit, leads a band of bandits, providing for his family and friends in a tough, remote area. His once beautiful face is now marred by a terrible scar, a painful reminder of a past encounter with a wolf. One day, Mikage ventures too far and gets captured by the wolves' leader, Tamaki. Ready to meet his fate, Mikage is instead offered a deal—his freedom in exchange for a one-night-stand with Tamaki. Despite his deep hatred for wolves, Mikage finds himself unexpectedly overwhelmed by the pleasure Tamaki gives him, experiencing the "ultimate sex" for the first time. However, this encounter leads to an unexpected month spent with Tamaki, who is in heat...

(Source: Takeshobo, translated)

Note: Includes one extra chapter.