Hinako's rubber sub obviously didn't learn his lesson from last time, because he's back again, this time in a leather rest sack (his first time in fact), being squeezed under the preasure of many leather belts. She then puts a gas mask on his head, hooking up a breath bag to make things a bit more difficult. Then, while he's dealing with all that, she takes the opportunity to play with his nipples and dick with the vibrator.