Menhera Shoujo Kurumi-chan - Vol. 2 Ch. 38 - It's not that bad

[MangaDex]

 

[Noiro]

Random character appears. Did she appear earlier?

 

[Virtyuu]

@Noiro I don't believe so but she looks a lot like the sister so I'm assuming she's a younger sister

 

[AnotherRat]

Ooohhhh so she's the other girl in the stickers!

 

[BakedBanana]

Can't fool me author, that's just Kurumi but with short hair. I guess she really wanted to surprise her boyfriend.