A gorgeous family who now has an additional, equally gorgeous, family member.
The siblings, Y/N and David, is about to meet their adoptive brother, Taeyong, without any clear explanation.
Y/N thought internally, 'Huh? Why does he look like dad? Yah, that's really amazing. I look more like mom but I also have a little of dad's looks. David might still be young but he also resembles dad a little. It looks like were a real family.'
Y/N being a serious daughter and Taeyong a playful, teasing adoptive brother, will the two get along together or be at each other's throat.