Kazuya enrolled in the "Academy for Extradimensional Affairs and Genetics" to support the Pandoras in their cause, bound by the dying wish of his older sister Kazuha, a Pandora who passed away at the end of a fierce battle four years ago. After he learns the rumors about Satellizer's treatment of those who touch her, he cannot believe it and ignores the warnings of others to apologize to her for causing her first loss.