Nagisa's best friend might be really surprised at first. But then, being a true friend, would support Nagisa through this strange change. They would probably help Nagisa with things like choosing girl - appropriate clothes or dealing with any mean comments from other students.
Kayano would be completely devastated. Since she had a special bond with Nagisa, she might become withdrawn and filled with rage, vowing to take revenge on whoever was responsible.
Their other classmates like Okuda would be very sweet. She might make them some special potions or concoctions as wedding gifts, something that symbolizes good luck and a long - lasting marriage. And she would be all shy and cute about presenting it to them.
It could be that a teacher or another adult mentions it during a class discussion. That might pique the interest of the E class and they start digging deeper.
The students would probably be very excited. Percy has a lot of charisma and his tales of adventure would be really interesting. Some students might be a bit intimidated at first, but once they see his friendly side, they'd warm up to him quickly.
A simple adventure - based fanfic could be where Tomoya and Nagisa decide to go on a road trip. Along the way, they discover new places, meet interesting people, and have heart - to - heart conversations that strengthen their relationship. They might even encounter some small challenges like getting lost or having car trouble, but they always get through it together.
In the 'Assassination Classroom' series, Nagisa is male. In fanfics, while some might play with the concept in creative ways like gender - bender scenarios for the sake of unique storylines, traditionally Nagisa is a male character.
Some students might be shocked at first. They've always known Snape as this rather complex and often unfriendly character towards Harry in the original story. So, the idea of him being Harry's dad completely flips their perception.