One good one might be 'Aizawa's Guidance for Izuku' which focuses on their unique mentor - mentee relationship evolving in an interesting way. It has great character development.
I also heard about 'Aizawa's Discovery of Izuku'. It portrays Izuku's growth under Aizawa's watchful eye in a very detailed and captivating manner. The story line is full of twists and turns that keep the readers hooked.
Some dedicated My Hero Academia fanfiction forums might also have these stories. You can join these forums and ask around. Members are usually helpful in pointing you to the right stories.
One good one could be 'Izuku and Mina's Adventure'. In this story, they go on a quest together which helps them discover their feelings for each other. The author does a great job of developing their relationship in a cute and interesting way.
One popular story might be 'Izuku and Nejire's Adventure'. It often has interesting character interactions where they go on quests together and develop a deep bond. The story may also include some sweet moments between them.
In some fanfictions, Aizawa might be under the influence of a villain's quirk that makes him act against his will. So, he kidnaps Izuku, but later on, he realizes what he's done and tries to make amends. This could lead to a story full of drama and redemption.
I'm not sure of specific 'izuku snaps at aizawa fanfiction' titles off the top of my head. You could try searching on fanfiction platforms like Archive of Our Own. They usually have a wide variety of fanfics, and you can use those keywords in the search bar to find relevant stories.
There are also some fan - made comics that are not lemon - related but show a great connection between the two characters. For example, 'The Heroic Legacy' which shows how Izuku is inspired by All Might and how he tries to carry on his legacy in a positive and pure way.
One scenario could be that Izuku is on the roof to get some fresh air and clear his head. Aizawa, being the observant teacher he is, follows him there. He could then share some of his own experiences with Izuku, like how he overcame difficulties in his youth, which would inspire Izuku and strengthen their relationship in the fanfiction world.
One reason could be that Izuku has been pushed to his limit. Maybe Aizawa has been overly critical or strict in a way that Izuku can't take anymore. For example, if Aizawa constantly doubts Izuku's abilities despite his efforts, it could lead to Izuku snapping.
Well, it could be about Izuku confronting Aizawa over some misrepresentation in the fanfiction. Maybe Izuku doesn't like how Aizawa is being portrayed as too strict or unfair in the fic.
It could be Aizawa himself if he's being controlled by something or has some sort of ulterior motive that is not in Izuku's best interest. But if not Aizawa, then there could be a hidden villain who is manipulating Aizawa to kidnap Izuku.