The erotic columnist Chen Weiwen found himself in a predicament when his columns were set to be discontinued. During a casual chat with a few friends, an idea suddenly struck him: why not pool together to shoot an adult film in Japan? They headed to Japan and enlisted the help of Koyama Shodai, a mediator familiar with the Japanese adult film industry, and began their 'investment in adult film shooting journey.' Initially, they only planned to observe the filming process. However, they offered too many suggestions from the sidelines, which led to the Japanese male actors leaving in frustration. Ultimately, Chen Weiwen was forced to step in as an adult film actor and, before he was mentally prepared, found himself overwhelmed by actress Tsumugi Aoi. He originally thought that after filming, there would be no further developments, but the news quickly spread like wildfire online and even made headlines, causing him to become an overnight sensation. However, this newfound fame made him lose his girlfriend, the mattress. In his despair and thoughts of suicide, he was persuaded by Koyama Shodai, who had rushed from Japan, to adopt the name 'Kozawa Mario' and join the ranks of male adult film actors, beginning a quirky journey.