I, the villain, trained the loser into a dark boss

In the novel 'I, the villain, trained the loser into a dark boss', readers follow Will, a skilled game planner who takes on the role of a cannon fodder villain. With a unique twist, Will sets out to turn the losers in the story into evil beings who torment the protagonist. Through his guidance, characters like the timid beast maid and the arrogant loli witch learn to manipulate and control their loved ones, leading to unexpected consequences. This captivating story is tagged as based on an anime, featuring an evil protagonist, a male lead, and themes of reincarnation and transmigration.