Tokyo: Oreimo

A parallel universe of Japan, during the bubble economy era.
A detective dad, a gossipy mom, a haughty sister, and a broken man.
Following his plan, Ryosuke Takagi embarked on a path of plagiarism, but after a family meeting, he accepted his mother's task.
Mieko: "There's something I need to ask you."
So, Ryosuke got a tracker, and its location device was on his younger sister Takashiro Ryōno's backpack.