Infinite Reincarnation Across the Multiverse: Why Are All My Teammates Yandere?

Current worlds: Zombie Apocalypse -> Everyday Life -> Naruto Prelude -> Jujutsu Kaisen -> TBD... What did we Summoners ever do to you? We Summoners rely on luck, need good execution, and take skill... After transmigrating through an infinite crossover world, Lin Yu, the protagonist, awakened the top class of the infamous Nine Classes from the start: Summoner. Fortunately, his pre-transmigration Steam account became his talent, and he still remembered the plots. Infinite worlds? Easy! But why are his teammates getting weirder and weirder? Natsuki Natsumi: "As long as I can save you, I don't care how many times I have to die!" Uchiha Hikari: "I'm going to create a world where only Yu and I exist!" Akemi Homura: "No matter how many times I have to start over, as long as I can save you..." Lin Yu: "Wait, are these really proper teammates you summoned?" Steam: "Just tell me, aren't the mechanics and power levels insane?"