Boarding School Juliet/Collaborations

Boarding School Juliet has had collaborative projects with other manga series' universes, or had received one from other authors.

Official Anthology

 * Main article: Boarding School Juliet: The Official Anthology

A collection of spin-off stories created by other authors, approved by Yousuke Kaneda.

Koi to Uso
Kishuku Gakkou no Juliet has crossover with Koi to Uso in Bonus Chapter.

Kaguya-sama wa Kokurasetai & Tejina Senpai
Kishuku Gakkou no Juliet has crossovers in Kaguya-sama wa Kokurasetai manga chapter 49 (made by Aka Akasaka) & chapter 52 (made by Yousuke Kaneda). There is also crossover of Kishuku Gakkou no Juliet in Tejina Senpai manga chapter 44.