After I Transmigrated into a Book, the Heroine Started Shipping Me with My Senior Brother. What Do I Do?

[Upright, Thoughtful Good Boy vs. King of Showing Off] [As per international convention: one-on-one, both pure] Gu Cimu is a heartthrob, a model young man with impeccable roots and a permanent Mary Sue aura. Countless girls chase after him, making him the most popular guy in the entire xianxia world. Ye Yuan'ge, transmigrated into the role of his cannon-fodder junior fellow disciple, can't accept this. As a master of showing off, even after transmigrating into a book, Ye Yuan'ge gets a task that's anything but ordinary: Take down the heartthrob, marry a rich beauty, take over the Ten Thousand Sword Sect, and reach the pinnacle of life. But can someone explain why his popularity is going up, yet he still isn't getting the treatment he was promised in the book? The original heroine: “Senior Brother Gu told me to stay away from you, so please don't take it personally, Junior Brother!” The original second female lead: “You're a wonderful person, so I think you and Great Hero Gu would be perfect together.” Ye Yuan'ge, on the verge of a breakdown, goes to the System to demand justice, only to find that it has changed its name to the “Matchmaking System.” “So I'm not actually here to take down the heartthrob?” A clear, youthful voice rings out behind him. Before he can react, an arm pulls him into an embrace. “Junior Brother, the time has come. We should get married.”