After Eating Fungi, He Mistook His Best Friend's Brother for a Dog

Is There Any Novel About a Rich Family Where the Male Protagonist Is Named Mu Si Nian and the Female Protagonist's Nickname Is Xixi?

The male protagonist and the female protagonist have been childhood sweethearts. The male protagonist has always liked the female protagonist. The female protagonist also secretly has a crush on the male protagonist. But for some reasons, she thought that the male protagonist did not like her. Later, she got together with a boy named Huo. Her boyfriend left and went abroad. The male protagonist and the female protagonist got married. A novel about marriage first and love later.