Happy Life with My Best Friend's Ex-Fiancé

She experienced what it was like to be with her best friend's fiancé. She had an affair with her best friend's fiancé because she was drunk, but he canceled the engagement with her best friend because of the person in charge, and turned around to get a marriage certificate from her. She was ashamed of her best friend, so she got married in secret, until she found out that her best friend and her ex-fiancé were getting married, and she settled down! After exchanging husbands with her best friend, her life seemed to be on the hook, and her vest fell off one by one...