Hi! You can try following either of the guides on Steam. One is vaguer and the other is more exact-
https://steamcommunity.com/app/782340/guides/#scrollTop=0
But for one tip, you have to get on the guide's path but once you're on it you can't be 100% fixated on him. That leads to Kikka making a more desperate choice at the end. Things are "better" if she stays more grounded. Trying to rack up affection points isn't a great plan with a man like him.