百合ゲー世界なのに男の俺がヒロイン姉妹を幸せにしてしまうまで

Kuro Kaito, a 21-year-old working adult with no girlfriend, reluctantly attends the funeral of his rude senior. As he observes the relatives bickering over who will take custody of the children left behind, memories from his past life come flooding back. “This is the world of the Yuri Game!!!” Determined to help, the protagonist decides to take care of the four sisters himself until the game starts, since no one else seems willing. And so, a heartwarming slice-of-life romantic comedy unfolds between the protagonist and the four sisters in this Yuri Game world.