Kim Minseok, better known as Xiumin, works as a Barista at a rather popular Cafe in Gangnam. 

There, he becomes friends with a daily customer, Kim Jongdae, better known as Chen.

In the same Cafe, Luhan works alongside Xiumin and the two are best friends. 

With Chen, his best friend Zhang Yixing, better known as Lay, frequents the Cafe and becomes friends with Luhan. 

The four all become rather close friends.

But, will they stay as friends?

Or become something greater?