咲キ誇レ常世ノ華 (Sakihokore Tokoyo no Hana)

Background
One day we shall decay and vanish, but that's okay. For we will engrave a proof here that we lived

This song is part of the Kotonoha Project.

The first half is about Gin Kuzunoha who lives under preassure from his grandparents. One day he's contacted by a friendly kitsune who plays with him and eases his discomfort.

The second half about the forbidden love between his parents, Yasuna and Nogiran. The two of them had grown close, but after Yasuna was attacked by an Onryou, Nogiran revealed herself to be a Kitsune and defeated it. Though somewhat shocked, Yasuna decided to accept her and sometime later, Gin was born.