Hae-joon finds out that San-ha is struggling with insomnia and taking medication. So-hui comes to visit San-ha alone without telling Jeong-hee and asks him to stay with her and Jeong-hee. Dal keeps trying to hide her feelings for Hae-joon. Meanwhile, a big secret between Ju-won and San-ha is about to be revealed by none other than Hae-joon.