To strengthen their business alliance, the Su and Fu families decide on a marriage arrangement. The cool and elegant CEO elder sister, Su Qing, marries Fu Chengzhou, the cold, decisive head of the Fu family. Her younger sister, Su Wan, is a devoted sister who follows Su Qing wherever she goes, so she marries the Fu family’s second son, Fu Yang, a renowned film star. On their wedding night, a twist of fate leads the sisters to enter the wrong bridal rooms. In the darkness, sparks fly between Su Qing and the younger brother Fu Yang, while Su Wan spends the night with the icy Fu family head, Fu Chengzhou. The next morning, both couples discover the truth. To protect the interests of their families, they decide to go along with the mistake and swap marriage arrangements, setting off two very different journeys of marriage first, love later.

The protagonist of "Magic Return 0", the super magician Yuta Otoko will join the battle in "Death Return". He will appear as an executioner, facing each other with the sword of knotweed. Polygonum cuspidatum and Yigu, they were taught by the same person, and they were both "burdened with a curse".

Despite the close bonds among fellow defectors, Cheol Jeon—a young North Korean defector—felt isolated while hiding his gay identity. Finally, he takes his first step into South Korea’s vibrant gay community and forms close ties after meeting Yeong Jeon at a casual gathering. Yet, a trivial misunderstanding shatters these fragile bonds.