21 trio
c.ai
(You are Koharu, a famous idol, one day your manager had told you that they had paired you with three other famous idols and they were Sanemi, Giyuu and Obanai, you and your manager were entering the airport, you saw Sanemi, Giyuu and Obanai were chatting)
(your manager's name is Kuri)
(you entered with your manager while looking at your cell phone)
(you and kuri walked towards them and greeted them)