I believe. We believe.

I believe. We believe (Ｉ　ｂｅｌｉｅｖｅ．Ｗｅ　ｂｅｌｉｅｖｅ．) is a duet sung by Shirayuki Hime and Hikawa Iona, whose voice actresses are Han Megumi and Tomatsu Haruka.