The Tale of Nokdu S01 E18 Trap for Yul-Mu

"Mischievous gisaeng in training has a suspicious mother."

When Nok-Du and Dong-Ju are walking on the streets, an old lady stares at Dong-Ju as if she knows Dong-Ju. And Nok-Du and Dong-Ju run into the King again. The three of them go hiking to relieve the King's insomnia.