*Dark Blue Kiss* is a sort of sequel to *Kiss Me Again* (a Thai drama). Kao and Pete are in a stable relationship and closer than ever. However, Kao hasn’t told his mother that he’s gay and in a relationship, and he’s afraid she’ll find out. Things with Pete become complicated, though, when Kao’s mother introduces him to Non, the son of a colleague, and asks him to give Non private tuition. Kao’s closeness to Non makes Pete increasingly jealous. Sun, the owner of a bar that Kao frequents, has to accept the reality that there can never be anything between them. And this is where Mork comes in – a friend of Rain’s, his brother, whom he has repeatedly told to keep his distance because of his somewhat impetuous behaviour. But this behaviour intrigues him, and the two find themselves spending time together.