Be Right Back.
Hansol and Byungjoo have a two year age difference. Byungjoo's parents are gone most of the time and Hansol lives with his homophobic mother. His dad is always out traveling for business purposes.
They're in drama class together and are willing to perform a play about love together on stage. But an 'unexpected' guest is there to watch them, and Hansol might have to leave Byungjoo.