3 layers of PVC rest sacks already make things incredibly hot and hard to breath, but what would happen if we also added a latex breath control mask to the situation? Well, if you ever wanted to know the answer to that question, you have come to the right place. Hinako does just that, and more! By locking the zipper of the outermost rest sack, we have a situation where the person inside this inescapable PVC prison can only breathe through a tiny whole, no larger than a penny. Things only get more interesting though when the Hitachi is introduced. Watch and see for yourself!