It's January of 1999, and a high school transfer student is waiting at the train station for her cousin... hold up.
Canon in G is a Gender Flip fanfic of Kanon, and by that we mean every version of Kanon. Not just the visual novel and not just the Kyoto Animation version — this has elements of everything from Toei's adaptation to the manga (both the more faithful version and the very AU Kanon Another Story: Wonder Three) to official art to collectible card games. The very first passage also introduces ideas from the other games in the Seasonverse: AIR and CLANNAD.
Yuuko, our Yuuichi proxy, is a snarky, trollish, but caring girl who's searching for her memories in a more complex timeline than what we've seen, and there seem to be more eyes out looking after what goes on around her. "After all," the author's introduction states, "every version of Kanon has its surprises."
This fanfic contains examples of:
- Absurdly Powerful Student Council: It's mentioned that Kuze would really like this to happen and has occasionally invoked it (with the plagiarism investigation).
- Actor Allusion: The female Kuze now has a first name: Hiroka. Aside from being an actual name that somebody would give their kid, it's also a contraction of Kamiya Hiroshi, Kuze's voice actor from Kanon 2002. (Her character design is more in line with the 2006 version, though.)
- The Can Kicked Him: The conversation between Kaori and Yuuichi about Hanako-san the washroom ghost is brought into this fic but reversed, as Kaoru becomes aware of the whole "demon" situation before Yuuko does.
- Banana Peel: One of Makoto's prank ideas. Yuuko can't believe he actually tried it.
- Broad Strokes: There are parts of every version of Kanon in here.
- Clingy Jealous Girl: Kitagawa Junri is practically obsessed with getting Kaoru to notice her and accuses other girls of getting too close to him.
- Deadpan Snarker: Yuuko, with shades of Kyuuichi. Mahiro also has his moments.
- Embarrassing Cover-Up: Kaoru tells Yuuko not to speak of their phone call where Kaoru asked, in a roundabout way, about the demons. Yuuko promptly tells Junri that they were discussing Kaoru's "embarrassing rash".
- Fantastic Romance: It's Kanon, and it doesn't look like it's going for an Iori or Yuki end.
- Gender-Blender Name: The male Makoto keeps his female version's name. However, Jun, owner of another Gender Blender Name, becomes Junri.
- Gendered Outfit: Aside from using the male and female school uniforms on the opposite characters, the story also adapts characters' signature outfits (particularly their expanded wardrobes from the 2006 show) as men's or women's clothing, though nothing is fanserviced up. Makoto has a military cap instead of hair ribbons, whereas Sayuri's hair bow becomes Satoru's tie.
- Gender Flip: The premise. A number of differences separate this from any version of Kanon — in particular, drawing from all of them instead of just one — so it isn't a straight Rule 63, despite being inspired by the popular Sunohara Youko.
- Ghost Story: When Iori is explaining ikiryou to Makoto, it quickly becomes this as he starts having way too much fun with it.
- Girlish Pigtails: Junri has them.
- It Will Never Catch On: Kaoru's opinion of camera phones.
- Jerk with a Heart of Gold: Yuuko is a Key protagonist, after all.
- Late-Arrival Spoiler: For the original work. Iori is referred to as "Misaka Iori" in his introductory chapter, and when Mahiro meets Ayumu a second time, he immediately reports that he's seen an ikiryou.
- Long-Haired Pretty Boy: Mahiro.
- Samurai Ponytail: He keeps Mai's hairstyle.
- Love Martyr: Yuuko starts to think of Junri as one after Kaoru takes her for granted one too many times.
- Lower-Deck Episode: Chapter 4 contains a few brief Yuuko scenes and no Ayumu at all, and instead focuses on Makoto, Iori, and Mahiro.
- Millennium Bug: Yuuko's computer teacher is exasperated already at the rampant notion of a bug that would destroy technology as we know it, and it's only January 8th, 1999. The next year will probably not be kind to him.
- Musical Theme Naming: The chapters themselves. Like in Kanon 2002, they're named after songs from the OST, but in this all the names are varied; for example, Last Regrets becomes First Remembrance.
- Mysterious Employer: Mahiro has someone he's helping out - though it seems to be a mutual assistance thing - who knows about the "demons" in the school.
- The '90s/Turn of the Millennium: The setting.
- Nonuniform Uniform: Satoru is allowed to wear a tie even though there isn't one in the uniform guidelines.
- Odd Friendship: Makoto and Iori, although Makoto and Shiori rarely ever meet in any official version of Kanon.
- Pun-Based Title: Meaning both "a variation upon canon" and "a variation upon Kanon", and a reference to Pachelbel's Kanon, the namesake of the original game.
- The Stations of the Canon: Used on occasion but always twisted at least somewhat. By varying the characters involved and occasionally switching roles, chapter 4's callbacks to canon are at times unrecognizable.
- Verbal Tic: Every single one of them is kept, unmasculine or not.
- You Are the Translated Foreign Word: When Iori explains the concept of an "ikiryou", he adds "That's why they're called 'living spirits'."