Mingyu is a part-time barista of Diamond Café. He has friends namely Soonyoung, Seokmin, and Jeonghan, and everyone kind of secretly admires him. They have their own girlfriends—much to his disappointment and Mingyu was the one who helped Soonyoung and Younghee get together—making him think he'll be alone for the rest of his life, ironically.

He's the calm and collected guy, a student, a striking male that everyone around his vicinity is attracted toward him. But there's just one thing, and he doesn't feel any of it.

Then a blind yet very attractive and simple girl named Byeol comes into his life in the least he could expect.