Mamahaha no Tsurego ga Motokano datta

My Stepmom's Daughter Is My Ex

What would you like to edit?

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: 6.751 (scored by 121683121,683 users)
1 indicates a weighted score.
Ranked: #52722
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #863
Members: 269,782
Favorites: 1,515

Available At


Streaming Platforms

Ranked #5272Popularity #863Members 269,782
Add to My List
Episodes: /12


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

Related Anime

Characters & Voice Actors


Iizuka, Aya
Oomori, Shinji
Nishi, Kei
Ozawa, Fumihiro


Opening Theme

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


Aug 18, 2023
One of the best romance anime I've watched, right below kaguya sama and bunnygirl senpai.

The reason the rating is low is because of the title.( My stepmoms daughter is my ex) note: it doesn't have to do with the stepmom and step sister things you all watched on PH. In fact it doesn't have as much fan service as some other romance anime.

The story which is basically the title is a 7/10 for its originality.
The character development is a basic key in a romance story so its guaranteed to be good.

And once again if it wasn't for all the internet clowns hating on everything ...
Nov 15, 2023
Mixed Feelings
One of my favorite Manga to ever exist is Domestic na Kanojo (Domestic Girlfriend). Which had a very similar concept to this anime here, that being former lovers becoming step siblings, the only difference conceptually here there's only one stepsister. Which can be seen as an up or downgrade. My Stepmom's Daughter is my Ex takes this award-winning concept that has for some reason been used twice and offers a much more lighthearted and wholesome story than that of its counterpart. Which at the risk of sounding perverted, I would say is not as good of a way of writing this dynamic.

The reason being, ...
Nov 25, 2023
I have a bad habit of seeing a fucked up or retarded premise or title, saying “what the fuck is this?” and then clicking on it. And then at that point I’m enthralled and interested saying “ok what the fuck, where the hell is this going” and when that happens, I’m past the point of no return. I don’t know why I do that but I do it every time making me put shit like this on the list for the whole world to see. I could just leave it off the list, no one will know. In all honesty I’m tempted. But no. I ...

Interest Stacks

44 Entries · 120 Restacks
50 Entries · 196 Restacks


Recent News

Summer 2022 Simulcast List [Update 8/25]

Summer 2022 Simulcast List [Update 8/25]

In this thread, you'll find a comprehensive list of television anime acquired for simulcast release during the Summer 2022 season. Anime series licensed for more

PV Collection for Jun 20 - 26

PV Collection for Jun 20 - 26

Here is a collection of promotional videos (PV), television ads (CM), and trailers for the last week. This thread excludes videos that have already been featured in more

Recent Forum Discussion

Poll: Mamahaha no Tsurego ga Motokano datta Episode 12 Discussion ( 1 2 3 4 )
Stark700 - Sep 21, 2022
191 repliesby senpaiitsuka »»
Nov 10, 9:00 PM
Poll: Mamahaha no Tsurego ga Motokano datta Episode 11 Discussion ( 1 2 3 )
Stark700 - Sep 14, 2022
109 repliesby Thyriad-oPPailov »»
Sep 29, 4:07 PM
Poll: Mamahaha no Tsurego ga Motokano datta Episode 10 Discussion ( 1 2 3 )
Stark700 - Sep 7, 2022
101 repliesby Thyriad-oPPailov »»
Sep 29, 11:11 AM
Poll: Mamahaha no Tsurego ga Motokano datta Episode 9 Discussion ( 1 2 3 4 )
Stark700 - Aug 31, 2022
174 repliesby Thyriad-oPPailov »»
Sep 28, 4:19 PM
Poll: Mamahaha no Tsurego ga Motokano datta Episode 8 Discussion ( 1 2 3 )
Stark700 - Aug 24, 2022
112 repliesby Thyriad-oPPailov »»
Sep 28, 10:28 AM