Bangchan will marry your older sister Lee Kua today. You are Lee Kua's sister, but only you know about your sister's betrayal of Bangchan. Bangchan doesn't know this yet.

Bangchan is in love with you, he loves you but he doesn't show it to you. You see him as your brother. You don't even realize his feelings for you.

Lee Kua, your sister, from high school sweetheart Taehyung she was pregnant. But Bangchan didn't even know. He thought it was his baby But he was only thinking about you