From what I've read so far, this manga seems incredibly sweet; it really tugs at your heartstrings, because it revolves around the pain of lost love, of unrequited love. There's a large age gap (15 years), and the main girl character is quite young (10 years old), but given the circumstances, I think it's perfectly ok. I wouldn't describe it as "loli" at all, because it seems like this series will focus less on the "romance" of love, and more on the kindness and faithfulness of true love. Love that never disappears even when one person dies and the other is left behind. I doubt that this will be the kind of manga where they kiss, hold hands, etc. Maybe there will be a "10 years later" where they finally end up together again (that would be lovely). But I think the series will be so much more about healing the pain of their separation, more about learning to move on and seeing happiness in life again. The art is also really nice^^ Maybe it seems like I'm making too much of a shoujo manga, but it really touched me <3 - I definitely recommend it.