A collaboration stage or song with male idols who are shorter than 170cm! It just NEEDS to happen!
I would nominate as the members:
SVT's Woozi (164 cm) - the leader
iKon's Jinhwan (165 cm)
SKZ's Changbin (167 cm)
Sungwoon (167 cm)
Block B's Taeil (167 cm)
Pentagon's Jinho (168 cm)