Yeongwonui Sajeong

As the son of a wealthy CEO and a recessive omega, Jeong-Won is constantly being pressured by his father to get married and prove his worth. But everything changes when his adoptive alpha brother, Yeong-Won, returns to Korea and declares that he was raised to be Jeong-Won's husband. Soon after, Jeong-Won's obsession with Yeong-Won leads to the pair forming a deep bond that defies their family ties...(Source: Tappytoon) Note: Includes six extra chapters.