This was such a great read, I love the fact that both of our protagonist are mature young ...

This was such a great read, I love the fact that both of our protagonist are mature young children. I can't wait to see how their destiny will cross. Ps. Is it based on a novel? If it is, do leave a link of it. Thank you in advance.
ヾ(❀╹◡╹)ﾉ~