Miles, being the great guy he is, decided to share his girlfriend Miley with his bunny friend.
Of course, they had him wear a chastity cage and made him watch them go at it.
While Miles didn't mind watching them have fun, not being allowed to masturbate was a bit annoying, though it didn't stop him from cumming anyway.
He wasn't expecting his friend to fill his girlfriend up at first, but warmed to the idea fairly quickly.

This was the first time Miles ended up a cuckold, and it certainly wasn't the last!