My Friend's Little Sister Has It In For Me! Novel Volume 6 was written by mikawaghost and illustrated by tomari.

Akiteru’s made it his mission to find Iroha a friend she can be annoying with. But what’s he to do when his friend’s little sister doesn’t seem to have it in for him anymore?

The best laid plans of mice and men and all that...

No kidding—because when Akiteru tries to talk her out of her changed ways, he finds himself competing at the culture festival for the title of...Queen Nevermore?!

Can Akiteru defy the odds and become the prettiest girl at school? And even if he does, how will that help Iroha?