Most of the normal people use only 30% of their brain, but a group of people known as "doctors" can use from 50 to 60% of their brain and, therefore, has special abilities. However, these powers have their price: doctors must comply with certain restrictions. Ignoring these rules can lead to a loss of something precious from the inside. In the case of young Shotaro, he must stick to the good matter every day! In the central city of Tokyo, he meets the girl named Mana, and together they go on a trip to find Emine, childhood friend Shotaro. Will Shotaro do good daily or leaving laziness in his journey?