A "direct sequel" is a continuation or next part of a story that directly follows the events of a previous story. It picks up where the first one left off, with the same characters and plotlines. Full definition
There's a reason why direct sequels of hit comedies are so rare. (alphaprimitive.com)
Although the game is a very direct sequel, there's some good news for people who didn't play the original game. (esperino.com)
Dark Souls 3 reverses nearly every change made by Dark Souls 2 to deliver a game that is as direct a sequel, narratively and thematically and mechanically, as director Miyazaki will likely ever make. (pcgamer.com)