Kateikyoushi no Kishi Naito desu.  

There is an urgent situation. Seventeen-year-old Tooru Takasugi, who is known for his active lifestyle as a yankee, is at risk of failing out of school. His mother seeks assistance from Naito Kishi, who is known for his charm. Can Kishi help save Tooru from failing? Additionally, why does Tooru feel butterflies in his stomach whenever he is near Kishi?