it's a parallel world where they are teacher and a student.
they are watching a movie about a assassin and a prostitute (themselves in the first story) and they are talking that they would never be able to do that stuff but even if they did they would still fall in love with each other (i don't know if i helped but well xD(
It probably means the two of them from the assassin world is actually watching the parallel world where they are normal. Probably.
Oh, thank you!!! Now I understood everything (⌒▽⌒)
Thank you!! Now I feel smarter (๑•ㅂ•)و✧
Lol no problem, it took me awhile too
Maybe I'm really stupid, but what does that TV at the last chaper end mean? It kinda confused me （￣へ￣）