Ryuu Shindo

He039s a happygolucky guy who is Kazuma039s best friend as well as his neighbor. He is also Teppei039s kindergarten teacher and is one of the few people who know about Kazuma and Fumino039s marriage. He helps to take care of Teppei. He also tells Fumino about Kazuma039s past. In one chapter Ry shows Fumino a picture of Kazuma and himself back in high school. Kazuma039s face looks dark and demonic in the picture and he had long hair with insane demonic eyes. He added that Kazuma beat up the cameraman after taking the picture. Ry also helps Fumino dress sexy for Kazuma. How he managed to have women039s lingerie is a mystery but it was revealed that he previously worked as a host in a club. Source: Wikipedia