Genzo Sonoda is 75 years old and is the grandfather of Shota, Yuma's husband. He seems like a nice old man, but he has an abnormally strong libido and is still a virile man to this day. He loves young girls with a lolita-like personality. He is exactly into Yuma, his granddaughter-in-law who has come to live with him. He takes advantage of Yuma's weakness, as she is very much like her grandpa, and makes advances on her without any discrimination...