Izuku and Momo are childhood bestfriends. Izuku did not meet Bakugou until Middle school. In this story Izuku is cold and rude to everyone except Momo ofc. So let me clear things up Inko has an Illness. That illness is cancer she had it for a while but didn't tell Izuku or anyone. So when you get to the part of when Inko is in the hospital you will know why. (ONLY IF YOU READ THE DESCRIPTION!)

L'histoire se place juste après la saison 4 de my hero academia après le gentleman criminel et le festival de yuei