I feel like my review is biased because after watching the main story Gravitation, it left me wanting more. I feel this anime gives you what the main story is lacking, which is a feeling of greater connection with the characters. The main characters' relationship is better explained and somewhat cuter in this than in the main story, although the rating of r-17 is a bit of a stretch really because there is no explicit nudity and only one or two scenes where it is hinted at. Overall, the animation is pretty much the same as the main storyline, but I feel that the connectionof the characters is better emphasised.