My Stepmom's Daughter Is My Ex

Mizuto and Yume are a former couple who enjoyed a relationship in junior high school, but became more and more irritated at each other, and used their graduation as an opportunity to break up. But on the day before entering high school, the two reunite in the most unlikely way: with their parents announcing a marriage, with Mizuto and Yume now becoming step-siblings. Wanting to prioritize their parents relationship, the two promise to not fool around with each other, establishing a rule where \the first one to get aroused\ loses.

2022 HD 24min TV-14 Japan Japanese

Nobuhiko Okamoto Rina Hidaka Ikumi Hasegawa Miyu Tomita Hiro Shimono

Animation Comedy

anime school romance slice of life

S1E3 - My Ex Has a Confession to Make 2022-07-20

Its nighttime at the Irido residence. Yume has somehow found herself with Mizutos boxers in her possession. If Mizuto were to find out, it would almost certainly mean she would have to face the punishment of admitting to being the younger sibling. Hoping to avoid this outcome, Yume waits for Mizuto to fall asleep before heading to the bathroom to return his underwear to the laundry basket. But who does she pass in the hallway, but a bewildered Mizuto, mouth agape, with Yumes very own bra dangling from his grasp.

S1E4 - That's Not What You're Supposed to Say 2022-07-27

As punishment for the underwear incident, Mizuto demands Yume go on a date with him. Yume is taken aback by the sudden development, but little did she know that it was all part of Kawanami Kogures devious plan, a plan to shatter Minami Akatsukis delusional dreams of marrying Mizuto only to become Yumes doting little sister. And how else to do it but to show her that Yume only has eyes for Mizuto?

S1E5 - The Former Couple Spends the Night 2022-08-03

Its Mothers Day, so Yume and Mizuto go out to buy a gift together. Their mother, Yuni, is overcome with happiness to receive a gift from the two of them. Seeing how happy it made her, Mizuto wonders if itd be nice to give their parents some time to be newlyweds together. However, there isnt much they can do for them on a high schoolers budget. So Mizuto suggests that he and Yume spend the night somewhere instead.

S1E6 - The Former Couple Goes Head-to-Head 2022-08-10

The first midterms of the school year are upon them. Once the top scoring student in the schools entrance exam and now a talented student at the top of her year, Yume is anxious to defend her position as a model student. She is displeased, however, to discover Mizuto’s relaxed approach to studying. The two later butt heads again, over something Mizuto did during their Japanese exam. Yume berates Mizuto for his actions while Mizuto retaliates in kind.

S1E7 - Higashira Isana Doesn't Know What Love Is 2022-08-17

Due to their mutual interest in light novels, Isana considered Mizuto a dear friend. However, Yume and Akatsuki make her realize that her feelings for him may run much deeper than that. Now aware of her true feelings, Isana wishes to become Mizutos girlfriend. Unfortunately, he doesnt seem to be reacting to her advances. Yume and Akatsuki try to give her advice, but it doesnt quite go according to plan.

S1E8 - The Former Couple's On Edge \"I've Already Been Rejected, So It's Fine.\" 2022-08-24

Isana is coming over to the Irido house this weekend to hang out with Mizuto. Suspecting that she may not know how to properly dress for the occasion, Yume and Akatsuki invite Isana out to go clothes shopping the day before. Unfortunately, however, every outfit she tries on ends up looking inappropriate due to the size of her breasts. Akatsuki suggests that she try on something with a softer silhouette similar to Yumes usual style, seeing this as an opportunity to pick out new clothes for Yume to try on too. Yume then reminisces about a date she had in middle school.

S1E9 - Youthful Indiscretion 2022-08-31

We are brought back in time to when Yume and Mizuto were once a couple. A time when neither of them could control their nerves in what was their first ever relationship. Having already held hands and kissed before, the young couple are eager to take the next step. Spring break passes, however, with neither able to make the first move. Upon entering their third and final year of middle school, the two are regrettably put into separate classes. Alas, unable to spend as much time together as before, they both begin to grow apart.

S1E10 - The Former Couple Doesn't Know How to Act \"Aren't You Two Acting a Little Awkward?\" 2022-09-07

Its Yume and Mizutos first summer together as stepsiblings. Their parents are unable to return home one night due to a typhoon. Now alone in the house together, trouble arises when Yume spots a certain creepy crawly in her room. On another day, Mizuto accompanies Yume clothes shopping for a swimsuit in preparation for an upcoming family trip to the countryside. Its in situations like these that the two seem to be finding themselves reminiscing about the past more and more...

S1E11 - The Former Couple Visits Relatives \"I Guess You Could Say She Loved to Laugh\" 2022-09-14

The Irido family go to the countryside to visit relatives. There, Mizuto shows Yume the first book he ever read on his own, his great-grandfathers autobiography. Reading it prompts Yume to ask him what kind of person his first love was. The description he gives, that she was someone who loved to laugh, leads her to believe his first love must have been none other than his second cousin, Madoka.

S1E12 - I Bestow Unto You My First Kiss 2022-09-21

Still in the countryside visiting relatives, Yume and Mizuto head to the local summer festival together. In high spirits from getting to see him in his yukata and seeing how Madoka and Chikuma interact as siblings, Yume boldly takes his hand in hers as they walk around the festival stalls. During their outing, Yume begins to get a picture of how Mizuto was as a child. And in doing so, realizes just what his meeting her meant to him.

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