I Experienced the Local Customs and Culture in Another World

I was reborn into another world, starting as an unknown duke's son. I began to distinguish myself in my first year of university, developing a complicated relationship with a princess. I also discovered other transmigrators and learned about various cultures: beast-eared girls, elves, succubi, and, importantly, dragon knights. Ultimately, I built a nation in this other world where different races lived in peace.