Fang Jia Hua is the successor of a business. His dream is to open a chocolate store and be an expert in chocolate. He ends up leaving his business and his family to fulfill his dream. Hong Xi En is someone who spent her days slogging and taking up part time work. One day, she ends up working for him and above all, she has to dress herself as a man for the job.
In Otomen, Asuka acts like a popular, manly man. However, he secretly likes girly hobbies such as sewing. In Hotaru No Hikari, it's the opposite, Hotaru acts like a typical OL, but at home she's a slob. Ironically, both love interest in these series are the exact opposite of the male/female leads.