Of the Red, the Light, and the Ayakashi Vol. 4 (manga)

When Tougo invites Akiyoshi and Yue over for dinner as a thank-you, all that's on the menu is food and fun. But when Tougo's father catches sight of Yue, he is startled and blurts out the name "Yoshiki." What exactly is the connection between this Yoshiki--to whom it seems Tougo owes his life--and Yue? And what kind of relationship existed between Yoshiki and Tougo's mother?! The secret behind the Meal is at long last revealed...