Houseboy: (a BDSM terminology) A submissive who keeps the house clean and may just be a sexual plaything whenever the Dominant wants.
or Rain notices his Master Phayu being overworked and decides to be a good plaything for him.
Rain has one of the best nights of his life. How did that lead to one of the worst morning afters ever? What Rain thought of as a one night stand, Phayu thought of as "getting married"