Pretty cute, but something about the banter between the three girls always feels off to me. Maybe it's because how similar Nagisa and her little cousin look? I seriously struggle to tell them apart most of the time so it becomes confusing to tell who says which line.
Learning from mistakes is difficult, but important. Still, it's better to figure things out in advance avoid the mistakes in the first place.
For example, you definitely don't want to learn by mistakes in:
• Airplane flying
• Bus driving
• Nuclear power plant operation
• Open heart surgery
• etc.