(Before you look at the first few choices of scenarios, I jut wanted to say I usually prefer being Keith)
1.
Info: Lance is the prince of Altea and Keith is part of the blade of marmora
2.
Info:It's a how to train your dragon au, Lance takes the place as hiccup and Keith takes the place of Astrid. Lance must have a night fury but all the other (Keith, Hunk, Pidge, Shiro, etc) can have any dragon of choice3.
Info: it's a high school au, Keith is a part of the cheerleading team and Lance is a hip hop dancer
Choose your scenario