My Friend's Little Sister Has It In For Me! Novel Volume 9 was written by mikawaghost and illustrated by tomari.

Thanks to Midori’s confession, Akiteru’s finally ready to work out his feelings!

Too bad he’s still in the middle of a class trip!

Mashiro goes on the offense and invites Akiteru on a date to a theme park, and Iroha’s mother greets them with open arms… But why the heck is Iroha there too?

Akiteru just wants to catch a break for once! Aren’t theme parks supposed to be fun?!