S1·E1 The Happiness Came with the Spring Breeze

A strange girl, Atsuko Higuchi, shows up at Ryunosuke's house and tells him to call her "Nuku Nuku." Her tragic past has left her with amnesia... but more importantly, he's head over heels for her! Meanwhile, Ryunosuke's mother Akiko is tasked by Mishima to retrieve their missing Androbot.