This is a LyCORIS model, trained on 24 sitcom stills from the 90s. From my tests, it can generalize into 90s "movie-like" or "informercial-like" screenshots as well. The images used in training were not blurry, but despite this, sometimes some outputs may be a little blurry, likely because the "90s" trigger word is associated with blurry images. Sometimes the bluriness may be desirable (given the retro style), sometimes it may not, so in order to consistently get sharp images, use a Flux workflow that supports negative prompts and use "blur, blurry" as negative prompts.