I looking for mangas (novel can also be mentioned but i want to find mangas) where there is real harem, I mean MC is with more than 1 girl. Something like Sono Mono. Nochi ni... or Isekai Meikyuu de Harem o. Furthermore I looking for manga with modern settings.

Would School Days count?

A World that I Rule. Its manwha but up your alley I think.

Umi no Misaki

This is my Sig ..............................................................

I prefer living MC 😀 from what i remember in School Days MC died and in World that I Rule, the story (for me) also didn't have happy end :/, about Umi no Misaki, I really liked it and if there is similar manga please post name 🙂

A incomplete list but, Harem and Sexually Active Protagonist .

for a sample across various genres: Hare Kon, Maou no Hajimekata, and Sakuranbo Syndrome (if you are happy with a two person harem).

If you are ok with light novels there is High School DxD (Novel)