Futago no Danjo ga Wakaranai
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Futago no Danjo ga Wakaranai

Alternative Titles

Synonyms: I Can't Tell Which Twin is Which Sex
Japanese: 双子の男女がわからない


Information

Type: Manga
Volumes: 3
Chapters: 16
Status: Finished
Published: Jan 16, 2021 to Mar 17, 2022
Genres: Comedy Comedy, Romance Romance
Theme: Crossdressing Crossdressing
Demographic: Shounen Shounen
Serialization: Shounen Magazine Edge
Authors: Abe, Hanajirou (Story & Art)

Statistics

Score: 6.211 (scored by 274274 users)
1 indicates a weighted score.
Ranked: #205302
2 based on the top manga page. Please note that 'R18+' titles are excluded.
Popularity: #17455
Members: 1,019
Favorites: 3

Available At

6.21
Ranked #20530Popularity #17455Members 1,019
Add to My List
Volumes: /3
Chapters: /16

Synopsis

Takushi Hatsujou had played with a twin brother and sister when they were all kids, and he fell in love with the sister, culminating in his asking for her hand in marriage when they grew up, to which she agreed. However, they were torn apart for 10 years until Takushi is finally able to get his grandfather's permission to marry her. When they finally reunite, he is surprised to find they both look like girls. Although he knows one of them is cross-dressing, he can't tell which is a guy and which is a girl.

(Source: MU)

Characters

Takeshi
Main
Nagomu
Main
Nozomu
Main

Reviews

Feb 10, 2026
I heard this manga and get curious about the situation this manga has. At first I like everyone just trying to figure it out who is Nazomu and which one is the female one but as I read, I become attached with the story. It also satirizes biases of the old generations about having a son to follow their footstep. The tangled relationship of the three and their story also make me sympathize so much. When I'm sure I know which one is which, the plot twist appear again so i really can't figure it out at all :)))
I'm really sad to see that this ...
Aug 9, 2025
Mixed Feelings
Overall I enjoyed the series, but MAN did the machine translation I read made it really hard to follow at times. For example, when it revealed who the guy twin was, I didn't even realize it was revealed.. The MTL was good enough to finish what was started, though good enough isn't always good.

The characters are pretty cookie-cutter and simple, to be honest. No one is really surprising or complicated, and I think that's fine sometimes. Not every story needs complex stories or characters. Sometimes it's fun to just sit back and watch what wacky hijinks our characters get into without being overly invested.

It's ...

Interest Stacks

26 Entries · 285 Restacks
50 Entries · 11 Restacks

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Recent Forum Discussion

Poll: Futago no Danjo ga Wakaranai Chapter 2 Discussion
luinthoron - Feb 8, 2021
0 repliesby luinthoron »»
Feb 8, 2021 12:26 AM