A more complex plot could be set in a post - apocalyptic world that combines elements of both RWBY and AOT. The male RWBY reader and the AOT girls are part of a group trying to rebuild society. There could be power struggles, cultural clashes between the two groups, and of course, the ever - present threats of Grimm and Titans. This type of plot would allow for a deep exploration of the characters and their relationships in a new and challenging setting.
One idea could be that the male reader is a transfer student to Beacon Academy. He has a unique Semblance that catches the attention of the RWBY girls. For example, his Semblance could be related to time manipulation. Ruby might be intrigued because she loves unique abilities and wants to learn from him. Weiss could initially be a bit standoffish but as she sees his skills and determination, she warms up to him. Blake would see something in him that reminds her of her own struggles, and Yang would be attracted to his confidence.
You can try websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can search for 'Male RWBY Reader x AOT Girls' specifically. Another option is Fanfiction.net, although the quality can vary. Just use their search functions to look for the relevant stories.
One idea could be that the MC discovers a hidden power within the AOT 2 game world that allows them to communicate with Titans. This could lead to a whole new way of approaching battles and understanding the lore. Another plot idea is the MC getting trapped in a glitchy part of the game where the rules of the AOT world are all jumbled up, like Titans and humans swapping abilities. Or perhaps the MC uncovers a secret conspiracy among the game's non - playable characters that threatens the entire in - game world.
One idea could be that the male pirate reader's ship crashes near Vale. He then meets Team RWBY and they initially mistake him for a threat. But as they get to know him, they find out he has valuable knowledge about some ancient Grimm - related secrets that could help them in their fight. So they form an uneasy alliance at first which gradually turns into a strong friendship.
Another interesting plot is where the male reader has a unique semblance that is different from what we've seen in the show. Maybe his semblance is related to time manipulation, and he uses it to help the RWBY team in various battles and missions. This adds a new dynamic to the story and allows for creative storytelling.
One plot idea could be that the male reader is a new student at Beacon Academy. He accidentally discovers Emerald's secret past and instead of exposing her, he offers to help her face her demons. This could lead to a deep bond forming between them as they go through various challenges together at the academy.
One idea could be a new student arriving at the school with a mysterious power that no one has seen before. This could cause both excitement and suspicion among the other students.
One idea could be a mercenary who is hired by a mysterious client to steal an ancient relic from Beacon Academy. He has to navigate through the various defenses and teams of Huntsmen and Huntresses.
A plot could involve an esports competition where teams from different kingdoms in the RWBY universe compete. The story could explore how the RWBY team overcomes rivalries and strategic differences. They might also have to deal with a mysterious hacker trying to disrupt the tournament.
Well, you could have a story where all the RWBY characters swap their semblances for a day in chibi form. Ruby with Weiss's glyphs, Weiss with Blake's shadow clones, Blake with Yang's strength, and Yang with Ruby's speed. It would lead to some really funny and unexpected situations as they try to go about their normal activities at school. Or perhaps a fanfiction where the chibi RWBY teams are transported to a world made entirely of sweets. They have to resist the temptation to eat everything while also finding a way back home. A third option might be a mystery plot. A valuable item has gone missing in Beacon's chibi - version campus, and the teams have to solve the mystery of who took it and why.