Kyuni Anega Dekimashite! - Vol. 1 Ch. 1

[StevenSteve]

The age gap on their siblings is insane i just realised that on Chapter 2

 

[xdharish]

Okay, let's do some investigation. He's 29, she's 19, that's already an FBI-level age gap, and now the main thing, so it's his older brother, not younger, and her younger sister, not older. In conclusion

 

[Hardik_7547]

The question is how old is her younger sister....?

Bro same, like WTF?

 

[AnimuVsMango]

Yes, you can live here...

...as long as you pay me rent.

Also, she's wrong, that's okaa-san territory, not onee-san.

 

[SveNo]

Might depend on the prefecture or law update but if I remember correctly girls could marry from as young as 16 in Japan

With parental consent, yes. The sisters' parents have passed away, so they cannot consent to marriage. Hence the younger sister has to be at least 18. They could be twins, with the FMC born five minutes before her sister.

Age of consent is 16 (used to be 13) and 18 is age of majority.