Since your song has a melancholic(?) feel to it, I'd say Grieving You fits well: https://www.mangago.me/read-manga/grieving_you/
It's a BL, if you don't mind, about 2 or basically 3 people with such lovely but sad stories connected to them. But I don't wanna spoil it. It SUCH a good read! Little bit jumpy cuts here and there but overall a nice read......
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