My Stepmom's Daughter is My Ex (Literature) - TV Tropes

Mizuto and Yume used to date each other at least until they broke up once they entered high school. In a twist of fate, the two exes end up becoming stepsiblings due to their parents marrying each other. As they set up their terms, they decide to …

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8 YA Books Featuring Characters who Are Happily Lesbian but Have Other Drama