Do Kyungsoo, a young and brilliant scientist working on highly innovative projects in a well-known University campus, gets one day a clumsy, dark and way-too-tall student as assistant. All of a sudden, his life, heart and glassware get all upside-down. Kim Jongin, chemistry major, is just too delighted to see 'this generation's most promising scientist' turning out to be an akward (yet surprisingly cute) wide-eyed penguin to care.

Jongdae knows how to brew the beverage at least as well as he knows the familiar face of his favourite daily customer.

In which Sehun is a florist, and Jongin a college student with issues. In which they meet, live, and love ensues.