Seeing as the first chapter was a one-shot, and the rest is the same story but more detail with both girls POV I'm guessing key scenes like the 5 month anniversary's love talk and breakup scene will be more devastating if they act like they did but actually felt different, specially Saeko who tries to cover what she feels with humor
Seeing as the first chapter was a one-shot, and the rest is the same story but more detail with both girls POV I'm guessing key scenes like the 5 month anniversary's love talk and breakup scene will be more devastating if they act like they did but actually felt different, specially Saeko who tries to cover what she feels with humor