You can start by looking on fanfiction.net. It has a large collection of fanfics from various fandoms, and there's a good chance you'll find some legoshi x oc fanfics there. Just use the search bar and type in the relevant keywords.
One idea could be a story where Legoshi and the OC meet in an unexpected place, like a hidden part of the school. The OC could be a new student who is a bit of an outcast, and Legoshi is drawn to their unique personality. They start to bond over their shared love for a particular type of music or art.
There were many comics where women disguised as men, such as Ghost Blade, Sword God Domain, Date Battle, Forbidden Magic, and so on. These comics all had female characters dressed in male clothing, telling the story of their adventures with the male characters. These comics were very popular and worth reading.
Disguising as an academic failure was the name of a novel. It was impossible to determine how many pages it had. Fake Student Scum was a fictional novel. The content and page number were deliberately set by the author.
Disguise in martial arts novels was a fictional skill that could make a person's appearance and identity identical to another person, or even achieve a surreal effect. However, there was no scientific evidence that disguising was a real skill.
The Book of Changes was not a book that specifically described the art of disguise. The Book of Changes was an ancient philosophical classic that mainly involved Yin and Yang, the five elements, divination, and other concepts. It had nothing to do with disguise. Although some of the concepts in the Book of Changes could be used to explain the principles of the Disguising Technique, this did not mean that the Disguising Technique was described in the Book of Changes.
Disguise is a fictional skill without any scientific evidence or practical application. Although it is popular in martial arts novels, it is just a fictional plot and fantasy.
A billionaire in disguise in novels could be charming and charismatic, yet guarded about their financial status. They might be seeking genuine connections or trying to avoid the trappings of wealth. Sometimes, they have a past that led them to adopt this disguise for protection or self-discovery.
There were many novels about women disguising as men, such as " Green Lotus Swordsman "," Lord Snow Eagle "," Full-time Expert ", and so on. These novels told the story of some female characters hiding their true identity under men's clothing and gradually growing into powerful swordsmen, lords, or professional players. These novels had complicated plots and vivid characters, which were deeply loved by readers.