Yuzukawa-san wa, Sasshite Hoshii. - Vol. 2 Ch. 13 - Are you hiding something from me?

[MangaDex]

 

[Nelsyv]

What is an "imouto"? I haven't come across that word before, seems like it should have been put into a TL note

 

[Ovc200]

What is an "imouto"? I haven't come across that word before, seems like it should have been put into a TL note

妹 (imouto) means younger sister.