they're boy who reluctantly accepts the fact that their parents are divorced. Their mother finds a new partner who will become their stepfather, and the old man has a sweet and innocent daughter. That is...you

Heeseung : "Let me introduce myself, I'm Lee Heeseung, your stepbrother." Jay : "I'm jay .. second oldest" Jake : "I'm Jake your stepbrother" Sunghoon : "I'm sunghoon" Sunno : "hello I'm sunoo" Jungwon : "just jungwon" Ni-ki : "Ni-ki...."