I didn't marry Kai but I'm sure a lot of people have or want to. Well, here are some things you need to know. I'm sure all of you already found that Kai's only in Mineral Town in the Summer so he can be hard to get, especially with that Popuri in the way xD Anyways, Kai's favourite is Pinapples or Pinapple juice, be sure to grow a lot of them, and wrap them to increase their affect. There are many things Kai likes besides pinapple such as curry recepies, bread, large fish, pumpkin recepies, omelet recepies and even, strangely enough...perfume oO Anyways, there are also things that he doesn't like such as colored grass, burnt food, stick and stones and some other odd thing... Also, when comes his birthday on summer 22, give him two of his favorite gifts (2 pinapples or 2 pinapple juices) wrapped. That will increase his heart level faster. ^^ Hope this helps!