Kurisu is a single father to a 4 yr old sweet girl. He got divorced to his wife because his wife does not feel the love a wife should be receiving. One day he drops by a patisserie since he likes bringing home sweets for his daughter. Because of frequenting this shop, he has noticed the young and handsome Niina. Due to some work concerns he asked his help for the article. Niina approaches him and makes him admit his real sexuality. Kurisu has been able to put up a front because of his care for his family but Niina tempts him to reveal his true self.
Seme's character is still shaky at chapter 4 because there's no love yet and he's seemingly a bad influence and a bit selfish.
Papa Sex Caramelized