37 year old sales manager Iwatsu is so caught up in work, he's unable to truly live his life. One night while looking at his graduation album on his phone, he receives a sudden call from a girl named Kana. He's taken to his hometown Kobe, where he lived as a teenager. Slowly, by way of Kana, Iwatsu's past is resuscitated.
Unfortunately the movie Sad Boyfriend is not yet available on HBO Max.
| Sound | Motoyoshi Tai | Music Producer |
| Writing | Yōka Kusano | Screenplay |
| Sound | Yuya Matsushita | Theme Song Performance |
| Writing | Saeki Nejime | Screenplay |
| Directing | Yōka Kusano | Director |
| Editing | Ken Himida | Editor |
| Directing | Chimura Toshimitsu | Assistant Director |
| Sound | Tatsuya Murayama | Music |
| Camera | Kazuhiro Suzuki | Director of Photography |
