
Quick answer — "Paradigm Box" by Chiharu Sawashiro and Shunsuke Takeuchi is the opening theme of Caligula.
"Paradigm Box" by Chiharu Sawashiro and Shunsuke Takeuchi is the opening theme of Caligula.
"Paradigm Box" is performed by Chiharu Sawashiro and Shunsuke Takeuchi.