Miae getting flashed by that pervert in S1 😐
But aside from that I don't think there is any canon event I would like to see changed or removed (same for any existing fact) coz every one of them is interconnected and influence how the characters and their relationships with others are. If any one were to be changed then it would be like changing the story and possibly some events changing.
This is why I would leave angst arcs and moments be, even if some of them are very cruel.
But 0 hesitation on the pervert flashing scene to be removed... I don't think I hv to explain why