Papa Doki! ~Papa ga Daisuki Dakedo, Kazoku Dakara Mondai Nai yo ne!~

Hiroshi Fujimoto lives with his wife and 3 daughters Momoka, Nene, and Chitose. He and his wife get along well and have sex every night. Hiroshi's friend and mad scientist genius Yuuichi Sasayama asks for his help with an experiment. Using Hiroshi's body as a template he creates a younger clone of Hiroshi and implants Hiroshi's memories into the younger body. Hiroshi gets to live his youth again! His wife is excited, she hasn't seen Hiroshi look so young and handsome in years but he now has a problem. He's become so gorgeous even his own daughters want him!