Ryosuke failed his university entrance exams and is now a rōnin. His concerned father asked an acquaintance's wife, the formidable home tutor Maki, to help Ryosuke with his studies. Ryosuke wants to pass next year, but he can't help but be distracted by Maki's alluring cleavage... Noticing this, Maki decides to reward him with H-type prizes for each problem solved, guiding Ryosuke towards university admission.
