X-Men First Class doujinshi acquired at the Movie Paradise in winter 2012.
I’m not gonna summarize all of them, but my faourite one is the one in the upper left corner, “デートしよう!”. In it, Charles and Erik go on a date in an aquarium, and Erik buys Charles a toy shark at the gift shop.
Another inetersting one is “Blue”, in which Erik *is* a shark. Well, a merman with a shark tail.