Distant Sky - Vol. 5 Ch. 5

[MangaDex]

 

[Pyxis255555]

Hii, in Korean usually people calls someone older than them Eonnie (Unnie), Noona, Oppa, and Hyeong, which translates to sister/brother. Girls calls older girls Eonnie/Unnie, and older boys Oppa. And boys calls older girls Noona, and older guys Hyeong. I think that's why Haneul keeps calling them sister. CMIIW