A young boy moves in with an adoptive family who have a son the same age as him. Seo Hae Bom and Jo Tae Seong end up in the same high school class. An unexpected romantic spark ignites between the two.

Ever since his parents passed away, Hae Bom has been living in Tae Sung's house. And now, being a 12th grader, he enters the same class as Tae Sung, which makes the whole situation way more awkward. Living together 24/7, Tae Sung and Hae Bom's relationship is bound to change.—mydramalist