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My Stepmom's Daughter Is My Ex

A boy and a girl started dating in middle school. They were lovey-dovey at first, but due to a misunderstanding over something trivial, they started feeling more frustration than excitement... In the end, they broke up when they graduated. However, Mizuto Irido and Yume Ayai meet again in a surprising way before they start high school. "Obviously I'm the older brother here." "Obviously I'm the older sister here." The child of their parent's new spouse is the ex they just broke up with?! Out of consideration for their parents, this former couple comes up with a "sibling rule," which is: "Whoever starts seeing the other as potentially attractive loses." But they sometimes run into each other right after a bath. They're also alone on their way to and from school, so... Because of the memories they share and because of this situation where they live under the same roof, how can they help but pay attention to each other?!

Season 1

E1 - The Former Couple Refuses to Say... 'It's things like this...!'

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E2 - My Ex Needs Taking Care Of 'Thirty-Eight Degrees, Apparently

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E3 - My Ex Has a Confession to Make 'You Didn't Do Anything Weird, Did You?

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E4 - That's Not What You're Supposed to Say

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E5 - The Former Couple Spends the Night 'You're Welcome

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E6 - The Former Couple Goes Head-to-Head 'Do You Think I'm Stupid?

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E7 - Higashira Isana Doesn't Know What Love Is

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E8 - The Former Couple's On Edge 'I've Already Been Rejected, So It's Fine.

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E9 - Youthful Indiscretion

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E10 - The Former Couple Doesn't Know How to Act 'Aren't You Two Acting a Little Awkward?

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E11 - The Former Couple Visits Relatives 'I Guess You Could Say She Loved to Laugh

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E12 - I Bestow Unto You My First Kiss

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