FL from a baby to a grown-up.
Realized their feelings for each other throughout the whole story. Only near to the end.
ML is a demon, so he never aged.
They got married. Had two kids. But she died cos she got old even, so they were happy.
Tragic ending but it shows some realism to it PLUS it is rather satisfying so although a little upsetting it is ann acceptable tragic end.
Hana to Akuma