They stayed in Seoul for five more days.
After Atlas had told Lucifer that he accepted the job, then reluctantly admitted that Jayce helped the demon solidify his decision (which Jayce nearly cried about), the three of them all explored Seoul Tower and dined at a French restaurant at the top level. Jayce was still gobsmacked by the view up-top, and when Jayce made a joke to Atlas about how this might be what the angels always saw, the demon had—shockingly—laughed out loud.
The following day, Jayce and Lucifer were once again alone. Atlas had given Jayce a goodbye hug, to Jayce's utter surprise (although Jayce returned the gesture tightly). Lucifer had rented them a car for the following days and took Jayce to Gyeongbokgung Palace and Bukchon Hanok Traditional Village, where Jayce learned
