From Now On, Our Hearts Will Be the Same Until Death.

Childhood Sweethearts Have a Two-Way Secret Love, and It's Best to Have a Strong Relationship with Each Other.

I want to read a book similar to "Paper Planes". I'm asking you all the bookworms out there, do you have any stories where childhood sweethearts fall in love with each other and have a crush on each other, which is very healing? It would be best if it's about a double love ε(*･ω･)_/ﾟ:･☆