Wabisuke Jinnouchi  

, 陣内侘助

A 41-year-old computer expert who is Natsuki's "first love" has returned to his estranged family after selling off a program he created to the U.S military. Although he was adopted by Sakae, he is actually an illegitimate son of Natsukis grandfather. The rest of the family is upset and angry with him for testing the Love Machine on Oz without their knowledge or consent.