100 kanojo while having the absurd premise of having to conquer 100 girls or they will die,like ,does do many things that make it stand out.
Retarou himself is almost the top tier of harem mc.He has those thick eyebrows and a sheer shonen determination to keep the girls happy.He has an identitiy of his own.He does have to still go out of his way to solve some of their issues even if these girls are his soulmates.He isnt passively getting a harem.
Even the girls themselves are interesting on their own merits.The girls themselves have a group dynamic on their own.They are not just passive trophies.They do talk about their own simillarities and differences with each other and from friendships with each other.You could even pausibly see a girl in real life wanting to join the harem just for the fun times they will have with a group of friends.As the anime continues,the situation and the stuff they do for fun will get more over the top.
There is a theme of EVERY GIRL IS BEST GIRL.Every girl has their own special charm,there are also no losers in this harem.The simple premise also means that the plot wont jump the shark in a bad way and will have a definite ending.
