asche's manga / #Yandere(4)

Protagonist begins as a spoiled brat but evolves into a genuinely likable character. Meanwhile, her ex-boyfriend socially isolates her and tries to bring her back under his control.

Stalker saves stalkee from several bad situations, has difficulty talking to her because he feels insecure.

Girl is reincarnated as the younger sister of a death game mastermind. In order to stay alive, she decides to act like a bit of a spaz so her brother won't get bored. He ends up developing a romantic interest in her.

FL reincarnates into villainess who is replaced by the true Saint, but it turns out both are Saints so the original bad ending doesn't come to pass. ML is a yandere and a bit stupid but still better than other leads out there.