

References to other animes/mangas?
15 minutes into the 10th episode of he anime Onimai, the main character Mahiro picks up a volume of a manga in a bookstore. The name of the manga and its cover are from a real manga - Masamune-kun's Revenge, as you can see in the second screenshot. This was the first time I encountered something like this.
- How common are these kind of references to real animes and mangas within anime, in your experience?