Transmigrating to Another World, I Save the World Through My Split Personalities

【Mostly ambiguous relationships among the cast + a male lead who isn't quite at the terminal stage of chuunibyou + ship whoever you like + System + transmigrate + eerie】 (Do not break up established couples, but widows are fair game 😋😋. The main story has no CP, but the secret identities do.) Su Han had just graduated from college and was in the terminal stages of chuunibyou when he choked to death on a mouthful of instant noodles... Believe it or not, he does. Because that mouthful sent him transmigrating, and he even got a System. That wasn't even the worst of it... “But why did you have to drop me into a high-risk world, huh? And one that's on the verge of destruction!” Su Han was at a loss. Since he was already here, he might as well try to save it. And so... A cool, aloof man in black strode through the frost and raised a hand, freezing a thousand miles in an instant. A flamboyant, fiery red-haired youth stood with sword in hand. One sweep of his sword unleashed an inferno across the land... And it wasn't just humans. There were also “Eerie beings.” “The Painter,” “The Dancer,” “The Student”... They are all loyal to “the Lord,” all loyal to “Si,” and all share one title: members of the Ten Thousand Stars Division. (The author isn't good at writing blurbs, so please read the story.)