The series explores the relationship of two people as they go from being “just acquaintances” to “a genuine couple”. Yoon Jin Ah (Son Ye Jin) is a single woman in her 30s who works as a store supervisor in a coffee shop. Despite being an easygoing person, she lives a rather empty life. She suddenly feels romantic feelings towards her best friend’s younger brother, Seo Joon Hee (Jung Hae In), a designer at a video game company, who has just returned from working abroad.