Kiss the Scars of the Girls, Vol. 2 - Aya Haruhana

Yucca's Big Sister was killed by a vampire hunter, causing her to slip into depression. Emille wants to help Yucca, but is offput by her obsession with making Emille become only hers. And Eve, the girl who swore she would never be someone's Big Sister, begins to have a change of heart... \nI couldn't bear to be hurt like that again. The death of her big sister at the hands of vampire hunters shattered Yucca's world. There was only one person left who she cared for--Emille. But the girl she so desired seemed out of reach, always with her big sister, Eve. In her attempts to stem the tide of jealousy and grief, Yucca steals Emille away, closing them off from the rest of the world. Now Emille's only hope is Eve. Before she can come to Emille's rescue, though, Eve must reckon with the scars that remain on her heart...