Parents are not present and so everything is on the oldest son. He is the head of the family and takes care of all his siblings
Liver or Die (2019)
Related
Five Sibling with oldest one raising all other. but it has more shouting and most of the time other siblings are ungrateful but still good.
they are similar in the story
Brother taking care of his siblings and suffering the most for them
But I liked the korean one more to be honest