i remember MC having a curse of a Harem and being forced in many tales and many heroines, where he has to save them all and it won’t stop till he chooses one girl! I remember the story being dropped sadly. It was such a good story as well.
hmm is that Ln that have manga adaptation? cuz this cat remember there ln manga adaptation with such premise.... too bad this cat forget put it on reading list ..... maybe hmmm btw if this cat remember it correctly one of future prediction is the world destroyed cuz various heroines goes to war each other for loves, oh his power also hmm on his bloodline from his father~ is that the story you looking for? akasich record or something also pop up~ set paw if this cat remember or other remember it~
Ore ga Heroine o Tasukesugite Sekai ga Little Mokushiroku!? Took some time to find because they left out some tags
It has alien, isekai and magic but they aren't tagged in mangadex. Figured it was easier to search the manga since it has less matches.