Naomi Yuki (daughter)
Around 25 years ago, twins Rinko and Ranko both had a crush on him. Ranko sent him a love letter in Rinko’s name, and pretending to be her went to meet him, in hopes of teasing him. But as his song for Rinko was awful toward her, she became angry and kicked him, insulting his song-writing abilities. He nevertheless grew closer to Rinko when they both went to the hospital to visit Ranko, who fell in a coma and died 3 years later. They got married and had a daughter Naomi.
He and Rinko were away in Hawaii, when the spirit of Ranko lingered.