My incredible love story

It's a story about a love but it's not an ordinary love story. In the first phase hero met an unknown girl in a unknown place she is different from everyone they slowly get to know each other. In the second phase they are madly in love but they don't express it because they thought it might end their friendship. In the third and last phase, finally the boy will express his feelings to the girls what he feels the girl will express too but then she will say she have to go from here and don't know when she can come back and then she suddenly disappeared after that the boy kept waiting for her and after a year she suddenly showed up and she promise nit to leave him again.