Its just a cleansing oil. Nothing bad will happen from having a good cleansing routine.
but personally, for the price and ingredients, I would use something else.
Bobbi Brown also has an amazing one, Sulwhasoo's is really good, and DHC's have better ingredients, a bit gentler for the skin
15 is an age where you start to see a change in your skin, and break out easily.. so using the pink cleansing oil from shu uemura can help