I Asked You to Be a Wingman and You Became Close to Your Best Friend Across from Me?

[Campus daily + single female protagonist + no system + no rebirth + growth] A good brother said that he wanted to pursue the girl he had a crush on, and he would not hesitate to become his adopted son, so he asked his brother to help lure away her school beauty best friend. Chen Zehuai actually didn't want to offend that high-altitude flower, but for the sake of his brother's happiness, he had to try! Xiao Yumo always felt that just living by the rules would be fine, but since her best friend met the childhood couple, she found that she was increasingly dissatisfied with her current boring life, so her eldest lady's aloof persona began to slowly collapse, and she gradually turned into a... Fun person? Tsundere Little Qingmei: Have you ever considered my feelings? The pace is slow and the introduction is weak, please move to the main text!