Dear "father", just take this bento box and leave the scene forever =___=
Koreans and their strange thing with family. If one member of your family isn't good for your own health, just cut them out of your life and move on. And that father is a good example for someone who isn't good for him.
(This isn't the first webtoon I'm reading/read with fukked up family relationships and the "we are family" blahblah.. or maybe it's an asian people thing?)