Kim Seokjin and Kim Namjoon. The university's top swimmers, close rivals, and future Olympic medalists.

That was always how it was supposed to be. Until Seokjin quit the team. With no warning, he just disappeared for a summer and came back with a weird aversion to water and a new attitude on life.

But Namjoon's not just going to let that happen. Seokjin's hiding something and Namjoon is going to figure out what it is.

the heart floats in salt water