My Classmate's Goal

Sung-chan and Soo-jin used to date. Soo-jin was expecting quality time together until he comes home drunk. A few years later, they break up and Soo-jin appears in front of Sung-chan who is about to marry Yoo-ri. Sung-chan and Soo-jin still like each other and they both desire each other. Will Sung-chan be happily married?