Locked in a small cage after extreme ballbusting

Description: After the slave only whines that his balls hurt him so much after all the cbt he got from me as a gift before, i now have some mercy on him and kick him for minutes extremely hard in his nuts, the fact that he has to stay on the leash makes things even nicer for me, how he keeps writhing and whining in pain. when i'm finished with him, i lock his cock away in the chastity. i'm sure he's now having a lot of fun with his hurting sex