I have the exact same questions!
Jaekyung’s unseasoned chicken is the answer
Probably savory foods
He may have two birthdays cause sometimes actors give out a fake birthday instead. Or this is maybe the case of the plot idk
Maybe he diabetic....
Bland food
Aren't savory foods, salty foods?
Maybe, lol.
Why does Seo-in have 2 birthdays?
If taegu hates greasy, sweet and salty foods, what kind of foods does he like???