I am an American living in Tokyo, Japan. To give you a fair idea about Tokyo, it is immensely crowded and even though Japan has developed a lot in terms of the economy there are a lot of things and criminals roaming freely in the different part of the city. I am going anonymous on this because I do not want any trouble from these criminals.
Every day while I travel to work here in Tokyo, the entire public transportation is crowded. It’s so much crowded that people literally touch each and every part of each others body. Various times I have seen young guys with a particular criminal look come in groups of 4–5 and surround a girl from all sides. Because of the very very less space, the squeeze the girl from all corners and so something like this to her.
This is a very modest screenshot I could find on the internet. Sometimes their hands go inside and the girl is very scared. I look like goons and nobody raises a voice. I asked about this from a friend of mine and he told me never to speak up about this to anyone.
Edit 1: Those who are saying this is a still from Japanese Porn then let me tell you that I have already mentioned earlier that the picture I have shared is from the internet. It may be from porn but what I saw, in reality, was far worse than the picture I have shared.