The official download of the Burning Brain app could be downloaded through the Nine Games APP or through Pea Pod. The specific download address and installation method could be found on the official website of the Nine Games APP and Pea Pod.
Searching for such content is not a good idea. It's against the law and not morally correct. Instead, explore other types of comics that are suitable for all ages and interests.
The 'How to Train Your Dragon' comic porn is highly inappropriate. It corrupts the innocent and creative world of the original story and can have negative impacts on viewers, especially children who are fans of the franchise.
It's extremely inappropriate. Such pornographic content based on a popular franchise like 'How Train Your Dragon' is against moral and legal standards.
There are no porn stories related to How I Met Your Mother. The show is known for its lighthearted and humorous plotlines, not for any adult-oriented content of that kind.