A little list of words in the story you may need to know. I will update as necessary!

• Oppa - term used by girls to adress their older brother or older male friend
• Umma - mother
• Omonim - mother; more respectful form
• Appa - father
• aegyo - cuteness, the act of making cute faces
• Omo - oh my goodness!
• Jagiya - honey, darling, sweetheart, etc.
• Yoboseyo - hello? (on the phone)
• Dongsaeng - younger friend/sibling
• Chingu - friend