Me and My Cursed Doppelganger

Lu Li: Yep, we've swapped bodies, and we're having the time of our lives :-) There are multiple male protagonists, and they are all named Lu Li. To tell them apart, the ones who appear later are written as Lu Li. Transmigrating into yourself from the book next door: a chaotic life begins... [Two Esports Stories, One Hit] The Strongest Top Laner in Esports × The Esports Tactician (a retired veteran pro player vs. a trash-talking king in his prime) A late-blooming retired pro player transmigrates back to his prime: Wait, what... S5? A life-or-death match? A newly released champion? I know how to play all of them. A hotheaded young pro player gets forced into retirement: What the heck, is it really reasonable to transmigrate and end up retired? Wait, S7? The answer to the meta! I'm in!!! [Interstellar Agents] Don't Lie to Me × Interstellar Agent 404 (a mind-reading expert who keeps his mouth shut vs. a wandering bounty hunter) A lucky-max, brutal vampire prince gets hit with a bad-luck debuff: Tsk, useless idiots. Have you all been marinated in bad luck or what? An unlucky mercenary charges into an over-the-top clan: Surrounded by overgrown latchkey kids, he stands there in stunned silence.jpg [Showbiz Collision] I Only Meant to Avoid Elimination, but I Survived Until the Group Debut × The Nation's Number One Singer (a fake royal's tool vs. a godlike singer who can kill you with his voice and never moves from his spot) A god of stationary singing is forced to save all living beings: Here we go, here we go. Mm, so... who is the real royal? A professional human shield transmigrates into a nationwide singing and dancing competition: Help, what kind of magical realism is this? Where's the science? Weren't we promised science?!!! [The Bewildering World of Cultivation] Relentlessly Ruining People × The Heartless Master's Ruthless Sword (a clear-eyed realist who reads too much into things vs. a loner who says, "Come at me if you disagree") A sickly, pampered junior disciple turns into a dueling maniac: What? A sparring match?! Look at me, how many punches do you think this body can take? OTZ A thick-headed social bandit becomes a beautiful, frail, pitiful shut-in disciple: Cough, teach... what... book... cough cough cough, you hit me, cough cough cough, and now we're best friends. #May We Always Be at Our Best# #Discover a Whole New Self# #Rescue Across Time and Space# #Level Up in Another World# Slay your inner demons and attain enlightenment on the spot! Maybe they'll grow to love each other, or maybe they'll sabotage each other across time and space. Expect everyday chuunibyou antics, silliness, and passion. P.S. The parenthetical content in the book titles refers to the original plots and is probably there to provide explanation. As for what the body swap changed, perhaps it changed nothing at all. (Feel free to skip this part.) Two male protagonists, parallel storylines + off-screen narration. This is probably a strange utility fic / leveling-up fic. Theme: Perhaps there's another way life could turn out.