Asu no Yoichi

Asu no Yoichi is a great anime.  The story is about a 17 year-old boy who moves into the city to a dojo ran by a group of four sisters after he is told by his father to go there because his father can no longer train him to become stronger.  This is mainly because Yoichi defeats his father easily.  Yoichi is training to become a samurai and his father trained him for the first 17 years but tells Yoichi to go to the city to continue his training and become a modern samurai.  For 17 years, Yoichi has lived in the mountains with no exposure to women, modern culture, or other people really, so it becomes comical the situations he gets himself into accidentally.   Coincidentally, the four sisters are around the same age as him, their parents have left on a "training trip" and it's only the four of them.

This anime is definitely geared towards 13-14 year-old boys from the abundant talk about boobs.  Now the word 'hentai' is used in the anime, but the word is simply translated as 'pervert', so don't worry about any nudity, there isn't any.  Scantily clad girls with huge boobs is about it.  I would have to give this anime about four out of five stars.