Ryuugan

Takashi is a rather studious child, with a rather high IQ, His twin sister, Rin although the same, prefers practice martial arts rather then study, are sent to a military/sport academy, by their Retired shinobi/samurai Grandfather to learn how to Defend themselves, others in need, and to fight for their country, family, and friends. How will the twins handle the hardships about to happen, in their new high school for many cultures.

(Yes I know the summary is well.., you know., Not good. But it is my kinda first and well, yeah, Enjoy ^-^)