Kool_lampshades's Manga

This isn't very interesting: girl marries duke who's really only considered scary because he's socially awkward and has a beard

"Illegitimate" daughter of family is cast out when "real" daughter appears, and shes rescued and helped by a ducal family or smth who must be extremely benevolent because they have no reason to go to the lengths they have

This is all over the place. Girl isekais into novel and tries to figure out what kind of novel it is. Eventually she finds out her sister has regressed

This isn't bad. Girl becomes character in a game show like situation where there are girls that compete to become the main character with their failure resulting in their deletion from existence

This is good. Our girl isekais into extinct fairy woman who marries villain.

Not bad, kind of "pet of the villainess" esque. Girl is friend of villainess and ML who hears noise unless he holds our girl's hand (cringe, perhaps?)

Eh, could still be good yet but not sure. The start was really rushed, i felt like it wasnt well established. A girl is forced to act as the lover of a mentally unwell duke who gives her a dragon's heart. She's regr wsssed 5 times and knows that the real girl comes back, so she leaves before that and starts a cafe or smth

Reincarnated boss becomes saintess sand her cronies locate and support her

It's in the name really. Girl isekais into woman in novel and sleeps with the tyrant ML. The end. I can't really see the story going anywhere - it lacks a bit if substance, but the art is really good