S1, E5: Joon-soo repeatedly expresses his feelings for Woo-yeon. When she rejects him, telling him that she doesn't want to be in a bad relationship, he suggests using him as a test subject.


S1, E5: Joon-soo repeatedly expresses his feelings for Woo-yeon. When she rejects him, telling him that she doesn't want to be in a bad relationship, he suggests using him as a test subject.