I wonder about this reaction. Realization that Erika has a sister, or that Miho's first time on the receiving end of being called "Onee-chan" (and reacts much like some version of Maho to being called that).

ithekro said:

I wonder about this reaction. Realization that Erika has a sister, or that Miho's first time on the receiving end of being called "Onee-chan" (and reacts much like some version of Maho to being called that).

I'm interpreting it as Miho discovering that her onee-chan switch was triggered.

ithekro said:

I wonder about this reaction. Realization that Erika has a sister, or that Miho's first time on the receiving end of being called "Onee-chan" (and reacts much like some version of Maho to being called that).

Jarlath said:

I'm interpreting it as Miho discovering that her onee-chan switch was triggered.

Guys, guys, it's just textbook gap-moe.

Wake up lieutenant

(Acording to my knowledge, Erika has a Big/little (i don't remember wich one was) sister Named "Monika"
(she's also based on a german ww2 song)