Tokyo: Oreimo

In a parallel universe of Japan, during the bubble economy era, Ryosuke Takagi is a detective father, a gossipy mother, a haughty younger sister, and a broken man. Following his plan, Ryosuke embarks on a path of plagiarism, but after a family meeting, he receives a task from his mother. Mieko: "I have a favor to ask you." Thus, Ryosuke receives a tracker, its location pinned to his stepsister, Ayano Takagi's, backpack.