Cardfight!! Vanguard - 4x05 - Season 4, Episode 5- Followmy.tv

Also having lost his memories pertaining to Aichi, Kamui challenges Kai after being recommended to do so by Gouki. Kai mentions Aichi to Kamui, but he does not remember him. When Kamui adds that Aichi must be too weak to remember, Naoki gets infuriated and challenges him in Kai's stead. So, Naoki and Kamui have a cardfight while Kai, Misaki, and Miwa watch. In the midst of battle, Naoki cries out to Kamui to remember by recalling significant moments that he and Aichi shared. When Naoki finishes the game with a Legion attack, Kamui finally regains his memories about Aichi. After the fight, Kamui is informed about everything, and Miwa recommends for the group to search for Aichi by themselves. Elsewhere, a man swears to not allow anyone to get near Aichi...