Chang Ryul and Jin Ho up the competition for the best design. Gae In enjoys the perks of having a gay roommate, despite Jin Ho's obsession with cleanliness.
In Hee refuses to take Chang Ryul back. Gae In tries to make amends with Jin Ho by cooking him dinner, which causes major stomach pains on the day of an important meeting.
Gae In plows forward in her plan to date Chang Ryul and dump him as a revenge. An encounter with Jin Ho's mother creates complications and a confusing mess of emotions.
Gae In and Jin Ho struggle with the idea of living under the same roof but not in the same room. In Hee tells Jin Ho's mother that Gae In may not be as innocent as she seems.