AU where both Itona and Kayano initially worked for Shiro. They were just two kids trying to offset their grief with bloodlust, before realizing fighting ice with fire would never work. When Kayano agrees to let Yanagisawa maintain her tentacles, she never expected to meet a boy like her in the research facility, nor did she expect to befriend him. An Itona-Kayano friendship fic and character study. Written for Assassination Classroom Big Bang 2020! Warnings: Blood, minor violence, minor self harm, suicidal thoughts