For the past ten years, Leo and Fiat have been the best of friends. Growing up together, they have been practically inseparable since childhood. As they’ve gotten older, however, they’ve begun to notice some unexpected changes. As a star basketball player, Leo has always enjoyed having Fiat cheering on the sidelines. But when Fiat begins to turn his attention elsewhere, Leo begins to worry someone may be trying to take his best friend away from him. Even more alarming to Leo than the fear of losing his best friend is the realization that his feelings for Fiat run much deeper than he ever imagined.

When clouds in the sky and falling rain tease the two close friends in trouble Rain and Sky, it takes them to meet Phayu and Prapai, who are not only cunning saviours but also guys making storms in the two best friends' hearts. The war of love is about to take place in the warm spring, hot summer, lonely autumn and cold winter. How would the atmosphere of love be? Which way would their hearts wave and the air full of love take them to?

Twenty-eight-year-old Phu Phurit moves from Bangkok to an island in order to look after a sea-themed bar, Full and a Half, with his close friend Phana. Orphaned from the age of twenty-five, merman Nawa is an easy-going bartender at Full and a Half.

Waranyu is a medical student, who, after undergoing surgery at a young age, gains special abilities by making a contract with the underworld. His life becomes intertwined with a grimreaper and what begins as turmoil gradually develops into a romantic connection between the two.