Help!! I can't remember what manga this is! It's about a girl who walks home with an umbrella but it has a hole in it and she uses it to peek at a guy in his apartment above hers everyday at 4 o'clock. One day after school her friends took her to a restaurant and it turns out that the guy she likes works there. He was about to be fired but she stood up and told the manager(and the whole restaurant) that she watched him everyday at 4 o' clock so he couldn't have done it(I don't remember what) and that she loves him. It all ends well, he gets to keep his job and later at his apartment, he thanks her. Also he asked her age and she replied 14(?) and he was 18 or something. And then it ends.

Please and thank you.