An alien octopus-like creature named Takopi arrives on Earth from the “Happy Planet” with a mission to bring joy, only to encounter a deeply troubled nine-year-old girl named Shizuka who is plagued by bullying and loneliness. Equipped with “happy gadgets” that can manipulate time and emotions, Takopi tries desperately to help her—only to accidentally trigger a devastating tragedy. To correct the consequences, Takopi repeatedly travels back in time, confronting moral complexities and the darkness lurking in human hearts. Through these painful loops, Takopi comes to understand that true healing isn’t simple or immediate. As the story unfolds, themes of empathy, trauma, and sacrifice emerge, revealing the limits of artificial happiness. This gripping and emotionally rich six-episode series blends sci-fi fantasy with dark drama to explore what it really means to be human.