Vibrant Hue: Scarlet Tai Chi Chuan

A Spell Card of Hong Meiling, who has almost reached the end (a Touhou LW original). She recalls reading manga with Remilia. Certain tengu draw their own manga, and some of it's been known to circulate around Gensokyo. It seems adventure series typically aimed at young boys are more popular than satirical manga, which is most commonly found in newspapers. There's actually a possibility some volumes from the outside world have made the rounds in Gensokyo.

For Meiling and Remilia, manga is a common interest. The two have strengthened their friendship in a way you might expect to find in a romance or coming-of-age manga―i.e., by lending each other different volumes and sharing their thoughts on what they've read. With both of them being so passionate, it wouldn't be strange for there to be a small manga section in the mansion's library. It's likely that even Patchouli reads manga despite making fun of Meiling and Remilia for doing so.