Matsu&#039;ura Mansaku is seventeen and is one of the seven protagonists in RAINBOW. He is nicknamed Cabbage. He has been detained for violence and underage drinking. He performed an act of violence while drunk, leaving the victim with grave injuries.    Despite his huge figure, Mansaku is quite gentle in nature and probably the most calm amongst the seven cell mates. He showed his caring nature by wiping away the blood clots from Sakuragi&#039;s body after he was heavily beaten and left senseless for being in a fight with new cell mates by the inspector in charge. 

Seven teenagers in 1955 have to learn to live together in the same hold in the reformatory of Shounan. Confined in a hall where suffering and humiliation are daily, they are waiting for a ray of hope in a dark, incarcerating world. The story follows their life together and how they move on afterwards. 

Six minors (16-17 years) answering to the nicknames of Joe, Mario, Suppon, Baremoto, Heitai, and Kyabetsu are put into a reformatory for offenses such as aggravated assault, swindling, flight, etc. Their stay in hell begins immediately. Accommodated by a doctor pedophile, they are placed under the watch of a despotic and brutal crew. Cellmates with a certain Sakuragi (called Anchan), the tension rises between the band of buddies and their new "friend." A brawl breaks out, and our six prisoners are done rossés by the mysterious young man, thanks to his boxing talent.
 
The story will not only follow the lives of these seven characters surviving in their hellish environment, but also their disillusions due to the rejection by the outside world and by their close relations. This is about the extraodinary and invincible friendships between these young men.
 Note: Won the 2005 Shogakukan Manga Award for seinen/general category.

Mansaku Matsuura