A disparate group of five university students unite together as friends. Two of the boys in the group, bad boy Pete and intelligent sensitive Kao, don’t tell the others that they know each other better than they are letting on. They hate each other, after a series of violent incidents that has set them at odds. One of these incidents ended up with them accidentally kissing. While it’s clear that Kao wants to talk about his confused feelings for Pete after the kiss, Pete pushes him away angrily, leading to more violence. Their friends eventually realise that something is wrong between Pete and Kao, leading Pete to lash out at Kao even more violently and destroy the group of friends. When Sun, the brother of one of Kao’s friends Rain, starts showing interest in Kao, Pete begins to understand his true feelings hidden under his jealousy.
Kao and Pete, being in a blissful romance, have grown closer. But with Kao being closeted from his mother, he fears and dreads the thought of her finding out. His mother then introduces Non, a son of a colleague, as he requires tutoring from Kao. With Non constantly giving off ‘iffy’ vibes towards Kao, it only fuels Pete’s jealousy. Their relationship is put in strain, but through this, they must ultimately overcome each other’s flaws. They both blossom in their youthfulness coated by their everlasting fondness for one another. Surrounded by the wonder of dark blue, Pete and Kao surrender to their feelings.