Well, without having read the 'alvin x presa fanfic' directly, it's hard to say precisely. However, if Alvin is a well - known character, perhaps it's a story that reimagines his story in a new context with the character or concept of 'presa'. It might involve things like a new mission, a different kind of friendship, or a struggle against a common enemy.
The 'the first tortilla story' could be about the origin of the tortilla. It might tell how it was first made, perhaps by ancient civilizations in Mesoamerica. Maybe it was a discovery made while trying to make use of maize in a new way, like grinding it and then flattening it into a flatbread - the tortilla.
I'm not sure who the author of 'short novel tortilla flat' is. There are many authors who write short novels, and without more context or research, it's difficult to determine.
I'm not entirely sure as I haven't read it specifically. But generally, it could be about the life and experiences in a place related to tortilla flat, perhaps with a unique set of characters and their stories.
I'm not sure specifically who the main characters in 'the first tortilla story' are. It could be an unnamed indigenous woman or man who first had the idea to make a tortilla from maize.
You could try searching on popular fanfic websites such as Archive of Our Own (AO3) or FanFiction.net. Just type in 'alvin x presa fanfic' in their search bars and see if any relevant stories come up.
I'm not sure which specific 'the first tortilla a bilingual story' you are referring to. It could be a story about the origin of the tortilla in a bilingual context, perhaps exploring how it was first made in a culture where two languages are commonly used.
We can learn about the cultural connection related to the tortilla. Since it's a bilingual story, we might also learn how different languages can be used to convey the same cultural concept.