Summary (not the same as the in-game one):Oh noes! You have to go to school again to get back someone's drawing paintings back to her, while she's ill for two weeks. But be careful, this school isn't any ordinary school (unless your school is ran by idiots, no offence), so your teacher is really, but REALLY sensitive to wrong answers, so don't expect it to be easy.
There are also other threats around the school which you also might want to avoid to succeed. Use items to your advantage and strategize your way out. Keep out for unexpected events which may randomly happen as time goes by.
Most importantly: don't anger him too much! You will regret it if you do so.