Vol 4: Ch 188 - Faint and collapse
The two of them are continuing what they're doing after telling her story to Rei. Ms. Na helping Rei and then when they feel sleepy they return back to the team and now taking a rest.
But after two hours, Rei awake first, preparing herself to take a bath and continue what she did until the team slowly waking up and prepare themselves before continuing their work.
All the Heads, Staffs and Members of the Concert Planning Team are doing their best even it's Valentine's Day today. The members who already married, have a boyfriend or lover are not spending this special day with their loved one because they were all serious about their task and that's because they only have 2 days left before the team leaves and go to J Country.