well, like the manga, this music video is 90% cuteness. The manga is rather short, so there is no real need for an anime adaption. You see your characters come to live for just a few minutes and that's enough. You can see the playful nature of the 2 neko 'Ruri and Hari', Kouryuu bullying Kohaku and their transformation by night and day. The song is cute, the lyrics shape the mood and the graphics are soft and magical. Hardly any story, so maybe this music video can be seen as an excellent trailer/teaser to read the manga. Make sure you do ^-^