Well, a Nishimiya x Ishida fanfiction often explores the relationship between these two characters. It could be about their friendship deepening into something more, like a romantic relationship. The fanfiction might focus on their interactions, how they understand each other's feelings, and the development of their bond over time.
This book was called "Hogwarts of a Certain Science." The characters in the book included the supporting role-Ling Long, a house-elf with brown elf blood. The male lead-Hans, whose real name was Hansel Brigid Zhang Emrys Darc. The female lead-Elsa, Verrit, Nishinomiya Glass. The female lead-Bamami. The female lead-Rokumeki. The female lead-Akihira. This book can be read on Qidian Chinese website.
"Hogwarts of a Certain Science" Author: Protect the Trash. It is a light novel/derivative doujinshi novel with elements of transmigration, invincibility, magic, and comics.
[User recommendation: Book friend recommendation in the comments section. Details will be added later.]
I hope you will like this book.