The Friend At The Tube

The story is about Y/N who has travelled from Russia to go to a campus in London.
Y/N has taken Jubille Line to travel to the campus in London however, Y/N realises they missed their stop.
However, as Y/N gets off the train. Y/N meets a particular british guy, holding a guitar case.
It seems he also missed his stop and looks at Y/N.
Little do they know, many things will happen in this chaotic yet small adventure in London City.