Mina is the personafication of Death who has come for Akitoshi's soul since he has reached the end of his life. However she will give him an extension of ten years if he fathers a child within a week.

Despite having come purely for his soul, she soon develops feelings for Akitoshi and makes love to him, but is soon caught by Hitomi. However, they soon have a threeway together, both getting pregnant with Akitoshi's children.