Original: เพื่อนต้องห้าม
A group of business students running a hostel blur the lines between friendship and romance.
Ray, Mew, Boston and Namcheum begin working on their university project to develop a hostel. Boston introduces Top to the friend group to help with the design work; Top and Mew instantly make a connection beyond their project. Meanwhile, Boston meets IT boy Nick and bar singer Sand looks after a drunk Ray.
Mew asks Top for a restart after Top's public proposal to be boyfriends at Yo's bar. Ray finds himself in need of company as all his friends are busy without him. Nick and Boston begin to hook up regularly, but Boston makes it clear that he is not interested in anything serious.
Ray, Mew, Boston, and Namchueam prepare for a pool party at the "Only Friends Hostel". Nick stresses over the status of his relationship with Boston. Boston approaches Top with some information about Mew and Ray's relationship.
Sand is upset after being ditched at the party. Ray reflects on his past, while Mew sets boundaries for their friendship. Nick confronts Top about his night in the car with Boston.
Ray spends the day with Sand to get to know him better. Mew begins to feel ready to take his relationship with Top a step further. Nick makes some changes in his life by buying a new wardrobe and going to the gym.
The group gathers at Yo's bar to celebrate Mew's birthday. However, relationships are impacted after a quarrel between Top and Sand sets off a chain of events.
Mew sets his sights on revenge after learning about Boston and Top's relationship at his birthday party. Meanwhile, Sand takes care of Ray following his car accident.
Ray and Mew decide to throw a Halloween party at the hostel, inviting everyone to join, but things take a turn for the worse when the police show up.
Sand and Nick go on a trip together, while Ray struggles with his competing feelings for Mew and Sand. Elsewhere, Top tries to get back on Mew's good side.
Mew is introduced to Top's ex, Boeing. Sand convinces Ray to go to rehab, while Boston tries to make amends with Nick.
Mew's efforts to punish Top by spending time with Boeing puts a strain on their attempt to move forward. Sand meets his ex while at the bar with Ray. Boston and Nick discuss their future together as Boston grows closer to leaving for America.
The group celebrates New Year's Eve together and the "Only Friends Hostel" finally opens its doors. Which couples will stay together, and who will remain only friends?
