Lost in Labyrinth (Sakigami Toto's Love Story)

"Yosuga has always been Toto's nee-chan, right?" Mitsuzaki Yosuga's life was filled with bleakness when she first got into DW. One day, a mysterious boy named Toto saved her from two bullies. Soon, her life experienced dramatic changes and their souls became intertwined at once. He would grant her a reason to live and she would only die by his hands. Toto x Yosuga!