Danshi Kinsei Game Sekai de Ore ga Yaru Beki Yuiitsu no Koto - Yuri no Aida ni Hasamaru Otoko Toshite Tensei Shite Shimaimashita

"Everything for the Score"—nicknamed "Esco"—is a renowned masterpiece in the world of yuri games. A boy who reincarnates into its world suddenly finds himself in the role of Sanjo Hiro, infamously known as "the guy who gets in the way of yuri." Hiro is a nuisance character who ends up ruined no matter which route he's in. To avoid triggering his death flags, he begins to train and search for a safe path—but for some reason, heroine events keep unfolding around him as the central figure...!? "I don't want a harem romcom! Just give me yuri! Let me see the yuri!" ___ (https://yenpress.com/series/the-only-thing-i-d-do-in-a-no-boys-allowed-game-world-novel)