It's worth reading after you finish the anime because it gives extra scenes not in the show that feel like they'd really fit within the show's context and give extra depth to some characters, also it's just a fun read altogether. There's a bunch of well-kown BL & non-BL mangaka who've drawn for this & including Migi the character designer for the show, so it's a mixed bag, there's definitely some chapters that are better than others depending on your taste.
Definitely recommended to fans who feel a bit empty after watching the anime.
