The camera is a great invention of human society, it can record everything in front of it in every detail and without bias. This kind of primitive and realistic image is called "documentary". Now the most popular "documentary" with the highest click rate on the Internet is "selfie". Selfies are often related to sex, love and desire. Four young teenagers, an old but working camera. Through their own experiences and some stunning experiences, they have made a complete, primitive, and even somewhat incredible record of how they experience the lower body. But one of these four good friends is still a virgin, and he is often laughed at by his other three companions because of his "unqualified" identity. But ridicule turned to ridicule, and they banded together to end their virgin career for their virgin movie friend-and they had to take a selfie of it all with a video camera. However, it is not easy to give it away for the first time, especially when they suffer from problems such as damage to their own interests, network errors and the sudden emergence of a porn star. What they are doing is nothing more than discussing the arrival of the "first time".