If you were to ask me what would be the most impactful first episode of an anime, it would be the very first episode of "Oshi no Ko." It does play with a bit of the supernatural, with the reincarnation of a doctor and his former patient as the twins to their favorite idol, Ai Hoshino, the atmosphere can still get emotional as you see Ai, as a teen mother and active idol, try to remain positive and upbeat through it all. This episode also heavily focuses on the dynamics of the Japanese entertainment industry, and you see Ai, being a teen idol first and foremost, also pursue acting and modeling, which comes with the job in real life as well. Eventually, you also see how Aqua, her son (and the reincarnation of her former physician), also enters the industry as a child actor, and how in turn, how competitive it can be through Kana, who wants to be a successful actress herself with how seriously she takes it. You defenitely see Ai and her children getting quality support from her management as they pursue in making her a star. Unfortunately, tragedy strikes as Ai is murdered by an obbsessive fan. Aqua then deduces the only person who could've known where they live and about the birth of him and his twin sister is his father. Assuming his birth father might also be in the entertainment industy, he decides to become an actor himself in search for him and have his revenge. I say if you're looking for something that has its ups and downs, the first episode of "Oshi no Ko" certainly doesn't pull its punches about it. If you want humor and tragedy, then you're going to get it. If you want some music that will pump you up, then get your glowsticks ready like an idol otaku!