Gene who aspires to be a horror/fantasy writer is pushed into writing BL novels by his publisher and now has been asked to participate in the creation of a series based on his most popular novel. In this participation he reconnects with an old friend from university, Tum, and the actor he manages named Nubsib.

Gene agrees to let Nubsib live with him for a month as a favor to Tum. During this time, Nubsib and Gene fall into a routine of sharing meals together and even begin to practice Nubsib's lines in the series he is filming.

Those who know Gene and Nubsib begin to take notice of their growing connection, including some fans online. Gene is kept occupied by pressure to complete his next novel as well as his upcoming reunion with his old classmates.

Gene attends a reunion with old classmates where he gets drunk and requires Nubsib to bring him home. As the one month deadline approaches, Gene reminds Tum of his requirement to find Nubsib a new place to live.

Aey approaches Gene for advice on how he can express his feelings for Nubsib. Aey's birthday leads to an uncomfortable family gathering.

Gene travels back home to visit with his family where he makes a surprising realization about his relationship with Nubsib.

Nubsib and Gene meet as children due to living in neighboring homes. Gene is a rare source of fondness towards Nubsib, who quickly becomes attached to his friend.

Gene recommends that he and Nubsib take a fresh start in their relationship by not living together. Later at the Bad Engineer Series promotional event, Aey grows frustrated with Gene and the attention his relationship with Nubsib is getting.

Gene is lured to a bar to meet Aey who promises that he has something important to discuss. Auntie Orn invites Gene and Nubsib home for a joint family dinner.

After Nubsib and Gene's private moment on the beach goes viral on twitter, the publishing house and the production studio begin to put pressure on Nubsib and Gene to separate.

Nubsib, Gene, and Aey attend a press conference to address the rumors about SibGene. Nubsib and Gene approach the end of the remaining four months of the contract with the production studio.