Wow, they're all so hungry for sex. They really can't wait, the energy just goes out of them. With such a hard blowjob you might as well kill your girlfriend, you have to be careful with these guys. In two phalluses at once, that's what I understand guys in the shot, it's a double punch. They were really grinding all her holes, and the rate of grinding didn't drop until the end of the threesome.
Till the end it's not clear, is it a comedy, a thriller or just a specific Japanese porn, with a weirdo hero. But it is interesting to watch. Especially surprised by the large breasts of a stranger, I thought the Japanese do not have these.