Backstabbed in a Backwater Dungeon: My Party Tried to Kill Me, But Thanks to an Infinite Gacha I Got LVL 9999 Friends and Am Out For Revenge (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!