Backstabbed in a Backwater Dungeon: My Party... (Manga) Vol. 11

Light takes a moment to savor his sweet revenge on Sionne, but there is no rest for the wrathful as Mei arrives with shocking news—Light's sister Yume has been found! Light heads to the Human Kingdom to bring Yume to safety, but along the way must face the memories of his time in the darkest Abyss!

Full Title: Backstabbed in a Backwater Dungeon: My Trusted Companions Tried to Kill Me, But Thanks to the Gift of an Unlimited Gacha I Got LVL 9999 Friends and Am Out For Revenge on my Former Party Members and the World (Manga)