User blog comment:27finnsprincess/The Talk About Marcy and Ice King.../@comment-25753001-20121016082020

So Simon gave Marceline Hambo, and Marceline and Simon developed a bond.

Then when Simon found the crown, he wrote a song saying that he will be sorry about him not remembering Marceline. This is because of the crown.

So what happened between Simon and Marceline? What bond did they have? All good questions, but none will be answered (I don't think).