What manga (i read it somewhere on mangafox.com) has step-siblings whose parents divorced again fall in love?

the boy and girl meet up at love hotels since their relationship is secret and remember that they are not genetically related since their parents remarried each other. it turns out that the mother of the girl refused to have anything to do with the boy and his father after the divorce. likewise, the father of the boy loved the girl as his daughter so when he found out he was pretty pissed. any clues or hints are gladly appreciated. IT IS NOT MARMALADE BOY!