Kaiba - Season 1 Episode 9 Shoot Warp! Even without my memories I love you.
Overview: Popo is now aware that the Warp in the heavens is a fake and decides to take this as an opportunity to form an uprising, with Neiro leading the charge. Kaiba has return to his original Warp body, so Popo gets Neiro to try and kill him, but she begins to question her memories of hate towards Warp.