A story of two threesomes. Part One. Chul-su marries the love of his life, Young-hee. But Young-hee is a lesbian with a lover, Young-chul. So Chul-su has no choice but to live together with his wife’s lover, who suffers from dementia. Part Two. Struggling to make ends meet, Young-hee is living with her husband Chul-su who became paralyzed after a car accident, and his gay lover Young-chul. Young-hee feels guilty because Young-chul is so devoted to her husband’s care and even changes his diapers. Her biggest fear is that one day her husband’s lover might ditch them and walk away from their lives.