Mamahaha no Tsurego ga Motokano datta

My Stepmom's Daughter Is My Ex

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Alternative Titles

Synonyms: My Stepsister is My Ex-Girlfriend, Tsurekano
Japanese: 継母の連れ子が元カノだった
English: My Stepmom's Daughter Is My Ex
More titles


Type: TV
Episodes: 12
Status: Finished Airing
Aired: Jul 6, 2022 to Sep 21, 2022
Premiered: Summer 2022
Broadcast: Wednesdays at 21:00 (JST)
Licensors: None found, add some
Studios: Project No.9
Source: Light novel
Genres: ComedyComedy, RomanceRomance
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 6.771 (scored by 109534109,534 users)
1 indicates a weighted score.
Ranked: #49592
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #892
Members: 250,577
Favorites: 1,464

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Ranked #4959Popularity #892Members 250,577
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Listless geek Mizuto Irido and introverted nerd Yume Ayai seemed like a match made in heaven, connected by their mutual love for literature. Unfortunately, their differences gradually grew, and they separated just after their middle school graduation. But, as if by divine comedy, the two find themselves reunited as step-siblings.

A rivalry begins to brew between the former couple, both unwilling to acknowledge the other as the older sibling. In an attempt to "solve" this issue, Mizuto and Yume agree upon a rule: whoever crosses the boundaries of siblinghood norms loses, and the winner will not only be called the older sibling, but also get to make a request. However, now that they live under the same roof, the lingering memories they share start to influence their actions—possibly rekindling the feelings that may not have been fully extinguished in the first place.

[Written by MAL Rewrite]


Mamahaha no Tsurego ga Motokano datta was released on Blu-ray in three volumes from October 26, 2022 to December 21, 2022.

Episode Videos

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Characters & Voice Actors



Opening Theme

Apple Music
Amazon Music
Youtube Music
"Deneb to Spica (デネブとスピカ)" by DIALOGUE+

Sep 21, 2022
Watching My Stepmom's Daughter is My Ex reminds me of the time when I was forced to stay for detention because I made a mistake in class. The real question to ask is if My Stepmom's Daughter is My Ex is a mistake. Yes, it damn right it is.

Based on the novels of the same name, you don't need a vivid imagination to see how our two main characters used to have a history together. It's simple as it gets: they used to be a couple. As fate would have it, Mizuto and Yume would reunite again due to their parents' martial status. The show ...
Sep 21, 2022
Mixed Feelings
First off i enjoyed watching Mamahaha no Tsurego ga Motokano datta, and the reason i enjoyed it because watching yume-chan was fun but i hated the MC, and you'll probably know that many people are showing hate towards it, well instead of watching a bullshit action anime I'll prefer this.
So the story starts from when two 13 yr olds who used to be lovers suddenly become siblings and whole series is about the awkwardness between them, they still hold feelings for each other and the MC who is a smartass and reads LNs all day.
And he is quiet and sad type like his whole ...
Sep 21, 2022
Mixed Feelings
This show can be summarized as follows: Ex-lovers obsessed with one another who later became siblings and are still obsessed and in love with one another in the present. The show is either a hit or a miss for most people, as there is no middle ground. Watch the first three episodes and decide whether it is worth continuing to watch. Even from just watching the trailer, you'd already know what to expect from the show, including the art and sound quality.

Yume and Irido's chemistry isn't all that great to begin with, and from a logical standpoint, their relationship appears forced with little to no ...

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Recent Forum Discussion

Poll: Mamahaha no Tsurego ga Motokano datta Episode 3 Discussion ( 1 2 )
Stark700 - Jul 20, 2022
82 repliesby DaaNiiJm»»
May 29, 9:59 AM
About LN, u can spoil to
Sugram22 - Nov 9, 2022
9 repliesby lov3lymj»»
May 9, 6:26 PM
Poll: Mamahaha no Tsurego ga Motokano datta Episode 7 Discussion ( 1 2 )
Stark700 - Aug 17, 2022
97 repliesby revival_ghost»»
Apr 26, 11:22 PM
Poll: Mamahaha no Tsurego ga Motokano datta Episode 12 Discussion ( 1 2 3 4 )
Stark700 - Sep 21, 2022
185 repliesby maesha2131»»
Apr 25, 7:11 PM
Poll: Mamahaha no Tsurego ga Motokano datta Episode 1 Discussion ( 1 2 3 )
Stark700 - Jul 6, 2022
149 repliesby Anelam01»»
Mar 27, 9:23 PM
It’s time to ditch the text file.
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