I'm not sure specifically as there could be many 'yamada love stories'. It might be about the love experiences of a person named Yamada, perhaps his or her journey in finding love, facing relationship challenges, and growing through love.
The main character is Yamada, of course. As for other characters, there could be a best friend who plays a role in Yamada's love story, giving advice or causing some misunderstandings. And then there may be a rival in love, who also has feelings for Yamada's love interest.
I'm not sure which specific 'Yamada My Love Story' you are referring to. There could be various stories with this name. It might be a personal story someone wrote, or perhaps a less - known piece of literature or film.
Since I don't know the exact details of 'Yamada My Love Story', it's hard to say for sure. But perhaps it has unique characters. Maybe Yamada has some very distinct personality traits that set the story apart.
I don't know for now. Usually, it depends on the demand and the plans of the production companies. You could follow related forums or social media groups for the latest info.