 The group was first conceived after former H.O.T member Moon Hee-joon invited Ahn, Tony An (H.O.T), Eun Ji-won (Sechs Kies) and Chun Myung-hoon (NRG) to create a reality show version of the television series "Reply 1997" in which they would meet up at a rented house to chat and reflect on their heyday.The show was called "Handsome Boys of the 20th Century" (20세기 미소년) and also featured special guests, mainly their former bandmates and contemporaries.The group has also launched a music video and performed on "".