Yoo Gaeun is done with dating. After her ex left her to marry a famous actress, she now spends her days running her late mother's studio and cleaning up after her twin's messes. But her quiet life changes drastically when crude and cranky Kang Siwan moves into a nearby house. Though Gaeun tries to be civil to her odd neighbor, sparks fly every time they meet, causing one argument after another. Will she ever manage to make peace with Siwan, or will the sparks set fire to something else in her?