The Chasing World

Strange murder cases that only targets people whose last name is Sato are happening in Japan. Meanwhile, high school student Sato Tsubasa winds up in a parallel world during a fight with gangsters. Everything seems the same, but his family, friends, and classmates are somehow different from who they used to be. Tsubasa cannot comprehend what is happening around him, but when he sees a girl getting killed in front of him by a persuer, he finds out that he is now in a world where the Emperor plays the fatal game of "Tag"; a chasing game (Onigokko) that only targets people named Sato. If you get clear away for few hours a day when the game is on going, and succeeds in running away for a week in total, any wish you have comes true. Tsubasa eventually notices that the parallel world is linked to the real world, killing same person who has already been killed in the parallel world. And when the siren sounds to signify that Onigokko has begun, Tsubasa races to protect his sister who of course has the same last name.
(Source: Asianwiki)