In a fanfiction, the Muggle teacher could be a relative of one of the trio. Let's say the teacher is Hermione's distant cousin. When Hermione, Ron, and Harry visit the teacher during the holidays, they discover that there are some strange magical occurrences around the teacher that they need to figure out. This could lead to a mystery - solving adventure.
One idea could be that a Muggle teacher accidentally stumbles upon the wizarding world while Hermione, Ron, and Harry are on a mission near a Muggle area. The Muggle teacher could initially be in shock but then become intrigued and start helping them in unexpected ways, like using Muggle technology to solve a magical problem.
Perhaps the Muggle teacher is brought to Hogwarts to teach a special class about Muggle culture. Hermione is excited as she loves learning about Muggles, Ron is a bit skeptical, and Harry is just amused. Chaos ensues as the Muggle teacher tries to adapt to the magical environment and the students' reactions.
The best chapter pointer here is Chapter 74, "Ordinary People". It opens with Having seen Jiang Li's ID before, he knew that this person named Shiguang... and closes on The man's phoenix eyes narrowed slightly, he looked at the girl sitting....
Look to Chapter 94 for the clearest answer. It begins with Jiang Li really has some skills, being able to figure that out." "Can the..., keeps building through I always feel my boyfriend is cheating on me., and lands on Brother is going to dress you up; look how pretty this outfit is."....
Chapter 75 is the strongest chapter-level answer because it starts from The ordinary people in the livestream were all stirred up by this scene. and follows through on But, being a half-baked practitioner is just fine..
The best chapter pointer here is Chapter 97, "Can This Really Be Broadcast?". It opens with Suddenly, Jiang Li's livestream room was packed with people, and the... and closes on And you believe what she says?.
Look to Chapter 114 for the clearest answer. It begins with As time passed, the number of viewers in the live broadcast gradually..., keeps building through After a whole day of trending searches yesterday, the popularity of..., and lands on But just now, an uncle came and said not to give you.
Look to Chapter 71 for the clearest answer. It begins with Shu Yan curled her lips with a hint of jealousy, "When can it be my turn..., keeps building through Who in this circle didn't know that Jiang Li had a thing for the..., and lands on Now they had to work on an empty stomach..
Chapter 133 is the strongest chapter-level answer because it starts from Watching Jiang Li and the others finish their meal and tidy up the table,... and follows through on It was only after she shared the concept and purpose of the show with him....
The best chapter pointer here is Chapter 73, "Does Someone Like Jiang Li Deserve to Have a Fan Club?". It opens with Director Sun, tongue-tied, finally managed to squeeze out a sentence,... and closes on Despite Wen Jiaojiao's fiery temper, there were still many who were drawn....
Chapter 98 is the strongest chapter-level answer because it starts from Jiang Li listened to the end and didn't have much of a reaction, only... and follows through on That's why she's not scared.]] Everyone held their breath, clearly, the....
Chapter 87 is the strongest chapter-level answer because it starts from Luckily, at that time, Jiang Li had already taken her pot of stinky... and follows through on I'm driven crazy by him every day.] [+1 from above!.