Keico

Keico is the slash ship between Boyfriend and Pico from the Friday Night Funkin' and Pico's School fandoms.

Friday Night Funkin'
They are now Ex-boyfriends after the shooting that caused Cassandra and her gang, they broke up and didn't see each other after a long time. It wasn't until Daddy Dearest hired him to kill his daughter's boyfriend, but he had no idea it was his ex-boyfriend, It was when they both meet at a train station that they finally met again, now Boyfriend having a girlfriend. Both ended on good terms, which even Pico saved Boyfriend and Girlfriend from Tankman and his army from being executed.

Pico's School: Love Conquers All
The game reveals that Boyfriend and Pico had been dating when they were teenagers and went to the same school.

Fanon
Keico is the most popular ship in the Friday Night Funkin' fandom on AO3. It also caused a resurgence in Pico's School content, causing Keico fics to overshadow ships between characters who actually originated in Pico's games.

Although it is confirmed that they are exes and that even Boyfriend has a girlfriend, the fandom still likes to ship them in love triangles with other characters or even believe that they are in a polyamorous relationship with Girlfriend. which has led the fandom to create their own mods about their relationship where they are still boyfriends. The most popular mod in which they are still a couple is called "Soft Mod".

Fandom
FAN FICTION

TUMBLR

Trivia

 * Ninja_Muffin99 (FNF's Creator) confirmed in a tweet that they were canonically boyfriends, now ex in the game timeline. The fandom believed that it was all a joke by part of the game creator himself, but it was later confirmed by the creator of Pico (Tom Fulp).
 * Boyfriend and Pico are both canonically bisexual.
 * The ship name derives from "Keith" being one of the Fanon names for Boyfriend. Even though the theory (among others) has been debunked in the game itself, people continue to refer to the ship as such, for the lack of a better name.