My Stepmom's Daughter Is My Ex
Season 1, Episode 1: The Former Couple Refuses to Say...
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Mizuto and Yume used to date, but now they've suddenly become stepsiblings. Both of them agree that they don't want to do anything that'd disappoint their newly remarried parents. However, neither of them can accept the other as being the eldest sibling in the relationship. So they both agree to settle the matter with a game. Whoever does something in conflict with what people might consider normal sibling behavior, loses. Making them the younger sibling.
All Episodes - Season 1
Episode 1
The Former Couple Refuses to Say...
Episode 2
My Ex Needs Taking Care Of
Episode 3
My Ex Has a Confession to Make
Episode 4
That's Not What You're Supposed to Say
Episode 5
The Former Couple Spends the Night
Episode 6
The Former Couple Goes Head-to-Head
Episode 7
Higashira Isana Doesn't Know What Love Is
Episode 8
The Former Couple's On Edge "I've Already Been Rejected, So It's Fine."
Episode 9
Youthful Indiscretion
Episode 10
The Former Couple Doesn't Know How to Act "Aren't You Two Acting a Little Awkward?"
Episode 11
The Former Couple Visits Relatives "I Guess You Could Say She Loved to Laugh"
Episode 12
I Bestow Unto You My First Kiss