Also, I've just thought of this, but here's a little dictionary for some of the terms I use often for those outside the kpop fandom that still wish to partake in my stories!
Dongsaeng - Korean word for younger sibling (genderless)
Hyung - Korean term of endearment for younger men to call slightly older men ("big brother") (also a common kink within Korean mlm stories; can stand in place of 'daddy', 'sir', etc.)
Oppa - Korean term of endearment for younger women to call slightly older men ("big brother") (also a common kink within Korean mlm stories; can stand in place of 'daddy', 'sir', etc.)
Maknae - Korean term for the youngest of a group (genderless)
Ahjussi - Korean term for 'old man'
Ahjumma - Korean term for 'old woman'
Jagiya/Jagi - Korean terms of endearment meaning 'honey', 'baby', or 'sweetheart'
Yeobo - Korean term of endearment meaning 'honey' or 'sweetheart'
Eonnie - Korean term of endearment for younger women to call slightly older women ("big sister")
Noona - Korean term of endearment for younger men to call slightly older women ("big sister")
Please let me know if I forgot anything :)