They are in the middle of holiday study camp！ Amano and Hayase go back to second grade level to improve their math abilities to get trough the U of T entrance exam.Amano upsets because he felt they are being made fun of， but he finally understands the reason that arithmetic and math are necessary for U of T test and also， for surviving in their life.Then， a legendary mathematics teacher， Tetsunosuke Yanagi， who was very popular in the previous series， appears. He starts training them with the same old his Spartan way of teaching....