Hyaluronic acid serum is used to prevent and treat dryness and is not meant for plumping lips. It is unlikely to work, and if it did, it would be temporary. It would be better to buy a product made to enhance the size of lips.
Stop using it. If you use anything on your face and it itches, burns, or goes red, wash off immediately and stop using, as you may have a slight allergy...
I think the best thing to do is just start off with Korean, as making two different tunes is very difficult, but you can just use the same tune, with...