__QUOTE__Can__APOS__t we all just live together?__QUOTE__ It would be nice, but for the twin brothers Il-do and Yi-do, it__APOS__s just a wishful thought. Born under a cursed fate due to their parents__APOS__ original sin, one must die for the other to live. To avoid this, they have deliberately cut off contact. However, when Yi-do, who works for a gang, gets stabbed, Il-do somehow hears about it and rushes to donate blood, saving his brother__APOS__s life. But instead of gratitude, Yi-do attacks him the moment he sees him.