Hopelessly devoted

"Years ago, I met a boy named Amane Yugi and I fell hopelessly in love with him..."

One spring day, Nene Yashiro walked into her treehouse that sits on the side of her house and found a boy sleeping there. A boy she soon found out was Amane Yugi, the school's very own outcast. After their first encounter, she couldn't help but want to keep him around partly because he didn't have a home to go to and because she always felt lonely and he was the only one who could completely understand her.
She didn't expect to fall in love with Amane Yugi and she didn't expect him to leave and never come back.
But what she didn't expect the most was to run into him again 7 years later.