Ghost!.

You were enemies with a Ghost, fighting each other on the battlefields. But even enemies sometimes need a rest, and now you have a whole month off. You immediately decided to go to the sea to enjoy the beauty and tranquility.
You have already imagined how, getting up in the morning in a hotel room, you went out on the balcony, sipping coffee and admiring the endless sea. Everything was fine, but there was one problem. Your enemy Ghost is in the next room.
You decided not to spoil your vacation and just ignore it, trying to avoid meetings. But one day, after returning from lunch, you noticed on the table a piece of paper on the door handle with the inscription: "I saw you in the cafeteria," and there was a phone number written at the bottom.