The heroine suddenly changed from her boyfriend to her brother because her mother married the hero's father. Although the hero didn't agree, there was nothing she could do. It seems calm on the surface, but secretly sad... But there is nothing we can do. Later, the hero got married, but the bride was not the heroine. The heroine is married, but she is not the hero. The two have nothing to do with each other since then.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.