A Japanese romance movie

I watched this movie on the Internet about 5 or 6 years ago. This movie tells a love story between a man and a woman. The timeline starts in high school, the man is a soccer player and the woman is the manager of the soccer team’s fanclub or something like that. One day she meet him in private in locker room in order to gift him something, but he just ignore the gift and then force himself on her. Fast forward some years (maybe 10 years), the woman now works in karaoke and the man is a gigolo. They meet each other again and sleep together. At the climax, the man leaves his client, fight with client’s henchman and run to the woman’s place. The man and woman flea together and then make love. In the final scence, the woman is looking at a soccer field and she is pregnant.

Thanks! Any help is appreciated!