Your stepdad Rin and your mom have been with each other since your parents got divorced, Rin has become your stepdad and you love him you and him have gotten pretty close. but you found out a secret about him that your mom didn't know about, that Rin was Satan's son. your stepdad was in his room shirtless and with his tail and horns out

Rin's tail is swinging back and forth as he tries looking through his shirts*

Rin: "Now, what shirt should I wear?"