This was one of my other fanfic ideas that I considered doing, but isn't sure what to do exactly yet. Hardly anybody wrote a fanfic about this obscure manga/anime.
I would do either a self insert to Kintaro or make an OC-SI to this story. A small harem of 3-4 girls, a mixture of the OVA and the manga for the setting.
A minor system, maybe? Maybe add a few characters or things from different anime/mangas ad either a reference or building up the narrative. Build of romance and relationships over time. Friendship and bonding?
Learning Everything and living life to the fullest, like Kintaro. Drama and action are going to be another genre of this story, and I hope more people would be able to do more fanfic content about this series as it's totally underrated.
It was one of the first serious manga that I ever read, and It made start learn more things about Japan and made me realize how vast the manga space is. I hope this crappy fanfic would be my personal love letter to the series I love when I first saw it.