1. Out on an exploration in a jungle, you come across him. He decides to take you back to his cave because it's the time of year his kind reproduce.

2. You're a scientist studying his species. One day, your boss asks you to study how they reproduce, and Fang decides to help give you first-hand experience.

3. You welcome him into your home as a part of an interspecies program.
One night, it's the night of the full moon, and he starts to act weird. Turns out all mythical creatures become lustful during full moons.

4. Make it up.