Perhaps the phone call is from a fellow demigod who is in trouble. Like, they're on a quest and need immediate help. The demigod in class then has to find a way to sneak out and go to their aid without getting caught by the teachers or other mortals. It could lead to all sorts of comical and tense situations as they try to balance their demigod duties and their school life.
It could also be that the phone call is from a god or goddess. They might be calling to give the demigod a special task or mission. This could be a test of the demigod's loyalty and abilities. The demigod would then have to figure out how to start on this mission while still being in the middle of a class, which would be really difficult and interesting to write about.
One possible plot could be that a demigod is in the middle of a really boring class when they get an urgent call from their godly parent. This call could be about a new quest that they have to embark on immediately. So, the demigod has to figure out how to get out of class and start the adventure without raising too much suspicion among their mortal classmates.
A likely main character could be Percy Jackson - like figure. He's a well - known demigod and having him get a call in class would be very in - character. He'd probably be a bit flustered at first, but then quickly switch into his heroic mode as he realizes the importance of the call.
In this kind of fanfiction, you'd have the demigods at the center. They could be new, inexperienced demigods just finding out about their powers. There would be their mentors, who might be more experienced demigods or even minor gods. These mentors could be the ones calling them during class to give advice or warn them of impending danger. Additionally, there could be other supernatural beings like nymphs or satyrs that are part of the demigod's world and are somehow involved in the events that lead to the calls during class.
In this fanfiction, Harley might be calling Peter in class to ask for help with a difficult assignment. Maybe Peter is really good at a certain subject and Harley is desperate for his assistance during class time.
There are so many possibilities. Maybe Wanda is calling Peter because she senses something strange about him that day. Like he has a new power or there's a threat to him that she can sense. This could lead to a whole adventure where they have to figure out what's going on together. They could start investigating things in the school or outside, and this call in class is the moment that sets everything in motion.
Well, in fanfiction, it could be that Fury has been observing Peter for a while and finally decides to recruit him for a special team. Calling him in class is a rather dramatic way to start this new chapter in Peter's life. Fury might see great potential in Peter, not just his powers but also his intelligence and quick - thinking ability. So he wants to get Peter involved right away, even if it means interrupting his class.
Well, maybe Peter gets really embarrassed. He might turn red and stutter when answering Natasha, causing the whole class to look at him curiously.
One possible plot could be that Luffy gets into a really tough situation during his adventures, perhaps surrounded by powerful enemies on an unknown island. In desperation, he calls out to Garp for help. Garp, despite his tough exterior, races to his grandson's aid. Along the way, he might reminisce about Luffy's growth and how far he has come.
One possibility is that Tony calls Peter to discuss an upcoming science project. Maybe they need to work together and Tony wants to plan out their tasks in class so they can start right away after school.
One possibility is that Peter gets really flustered. He might be in the middle of paying attention to the teacher when Deadpool calls, and his first reaction could be to try and hush Deadpool. Since Peter is often portrayed as a responsible student, this unexpected call could throw him off his game in class.