Both are queer love stories with a main character able to control/reverse time, with cool vfx when time-travelling. The main theme for both shows is regret and loss with the cost of love, and resetting things to aim for an ideal outcome.
Both series are based on novels by the same author, Zezeho, and share the same universe. Reverse 4 You centers on the story of Jattawa and Four, who are mothers to Maitree, the main character in Stuck With Me.
