An apple equals an apology in Korean dramas because the both words are pronounced the same way. “We give apples to make apologies,” explains somebody in episode 11 of Twenty Again (2015). This is why you see people gift apples in K-Dramaland quite a lot — as Geum Jan-di (Goo Hye-sun) does to Goo Jun-pyo (Lee Min-ho) in episode 8 of Boys Over Flowers (2009).
If you need to double your efforts with your excuses, why not add a bouquet of purple hyacinths like Yoon Yoo-jung (Yoon Eun-hye) did in Fluttering Warning (2018)?
Apples are also fruits that you offer your guests as a sort of dessert after you have peeled them.
These fruits are also used in death anniversary memorial ceremonies.