Mellow. Mysterious. Cute animation. All cats should come with bat wings.
Lo-fi is a lot of things, but I guess the easiest way to explain is that it's lulled imperfect/amateur audio aesthetic, if that makes sense. Obnoxious audiophiles would say it's low quality and that's all, but I disagree, it's a choice. It's meant for background music really, like what you'd hear in a video game or something you'd play while cramming for a biochem final.