The AV film 'Rin Hayakawa in Happening Sex' starts with a date-like scenario in the first half, but then shifts to a documentary style interacting with amateur partners, showcasing realistic reactions. While some believe Rin-chan's charm wasn't fully utilized, it can still be considered an enjoyable piece with a relaxing atmosphere and unique situations. Some viewers particularly enjoyed the outdoor and car scenes for their eroticism, making it a recommended choice for outdoor enthusiasts. However, there are mixed opinions on certain aspects of the direction. The scene at the reverse pick-up cafe is praised for its authenticity in bringing out Rin-chan's strengths. Some also find Rin-chan's unconventional works, as her portfolio grows, quite interesting. Overall, it can be said that this film offers a decently enjoyable experience.