Odd one out luka x gakupo

Hello everyone! Im Diamond. nice to "meet" you all!
I guess Lydia is the one who got me to anime, but
I found out about vocaloids by myself!
So this is a gakupo x luka story.
Rin, miku, and luka are bffs, but sometimes luka feels really left out.
why? maybe because shes actually SANE!
So what happenes when Luka gets dragged to a concert she has no interest in?
Maybe something good will happen there after all.