Ryouta Murai

Despite his manly appearance and reputation, Yukimura Sanada is a coward. A bunch of ninja decide to help him to be a real hero.

Kyougoku Daijirou is the 15th generation owner of the Kyoto sweets shop Amashoudou. One day, Daijirou discovers a giant robot named Doamaiger D in his store's basement. At the same time, enemies called "Mekaijuu" appear in Kyoto and begin wreaking havoc. (Source: ANN)