Father/daughter- widowed father desperately needed some relief 
Brother/sister- curious siblings looking to explore 
Kidnapper/hostage- the son of a mob family kidnaps a girl that draws his fathers interest
Boss/secretary- the secretary is always late until her boss showed her the error of her ways. 
Teacher/student- a struggling student reaches out to a teacher for help
Master/Maid -His mother gave him the gift of a maid for a year
Nun/Priest - a new nun learns how the church really works
Nun/Demon - a new nun is tempted by a handsome man
Son/Mother - a son takes his anger out on his mother
FBI Agent/Witness - the witness to a major crime has to enter the witness protection program to survive 
Boarding School - roommates 
Alien/human- An alien comes to Earth looking for a mate. 
Time traveler/person- You wake up in a time that isn't your own.