Transmigrating to various anime worlds, Lin Yi is bound to a god-level sign-in system and starts his journey by parachuting into Demon Slayer!

Sign in at the Kamado house to unlock the Demon Blade Thousand Blades, unleashing a multitude of blades to slay all evil spirits; sign in at the Wisteria Forest to obtain the perfect inheritance of the Breath of the Sun, where the blazing sun burns away the darkness of night.

Starting from the world of Demon Slayer... In each world, he keeps checking in and getting stronger! Eventually, he becomes an unparalleled powerhouse spanning multiple anime series!

Good news! He's been transported to the world of anime. Bad news! After being transported to the world of anime, he's been transported again! This time, he's transported to a deserted island. Good news too! The anime girl Sania is also transported with him: "Ella, you're my best friend. Jiuxiao is my most important friend, let's have fun together!" Fate: "Who's Nanoha? I don't know her at all!" Kaname Madoka: "Houmura-chan, don't get too close to me anymore, I'm afraid Jiuxiao will misunderstand." Yuan Jiuxiao says: "Don't argue, everyone is my wing." Jiuxiao thought he'd finally live a happy life, but he discovered that the girls had brought witches, alien armies, Gastrea, and all sorts of other weird things with them. The gate to another world has opened, and Yuan Jiuxiao has stepped into these familiar worlds. He'll be involved in many worlds, so stay tuned! The black bullet ends, current world: Puella Magi Madoka Magica. PS: Harem, no stock market speculation, no stomach-soothing elements. Many magical girls and characters from older anime are expected to appear. The first few chapters weren't very well written by this new author, so please be patient and read them a few more. If you don't click to read this, Watashi... I hope you enjoy it.