Kumagai is one of the inspectors in charge of Shonan Disciplinary School. He replaces Ishihara as the inspector in charge of the Cell 206 after an incident caused by Ishihara.    Kumagai is very kind and always shows great concern for the boys. He always greets them with a genuine smile. After he replaced Ishihara, the boys started to find a bit of peace in their confined lives.     ~!Kumagai came to know that Ishihara and Sasaki were planning to silence Sakuragi for good. While he tried to save unconscious Sakuragi from the verge of death, Kumagai was murdered by Ishihara. Sasaki managed to cover it up with a fake medical report thus his death remained a mystery. (Episode 7)!~

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. 

Born in Israel. Hometown: Berlin Nationality: German Languages: German, English, French, Hebrew Height: 1.88 m Hair: brown Eyes: brown-green  Not only a voice actor, but also a martial artist, singer, piano player and dancer.

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.