Wakamoto, Shingo

Shingo is a moody and nonchalant individual who is often the source of the more pessimistic opinions shared by the boys. He often makes selfish decisions for self-promotion or personal benefit at the expense of the 'team', putting him at odds with the other boys. Shingo is one of the more lecherous people in the boys, eagerly plotting to peek at a female bathing area with the other boys. He can be excessively narcissistic at times, holding his physical appearance in high esteem and requesting a hair pomade as a prisoner gift.

Though he is mostly loyal to the other boys, he sometimes acts with hypocrisy to betray them and then judge Kiyoshi Fujino badly for the same act. Shingo is prone to sulking and acting peevish when things are not going the way he likes, leaving his cell unkempt and constantly voicing his complaint when all their prison stays are extended.

His crush for Anzu Yokoyama changes him for the better and gives him a more positive outlook on life.

He is currently in an on-off relationship with Anzu Yokoyama. He becomes a spy for the USC and sells out information on his friends for good food and prison leave. When they are freed, he develops his relationship with Anzu.

(Source: Prison School Wiki)