Lin Beichen, an otaku, got a mobile phone by coincidence, and the mobile phone took him into a world called Dongdong Zhenzhou. Here, he became the first son of Lin Jinnan, one of the top ten famous men in the North Sea Empire [Zhantianhou]. He was also a notorious black sheep, and was born with brain disease. When Hou Lin was defeated in the south during the war, his family was in decline, and Lin Beichen, who lost his backer, was stuck in school by various' enemies' and couldn't go out. In a critical moment, he was surprised to find that the mobile phone he brought with him turned out to be a plug-in artifact that could help him practise. Relying on this artifact, Lin Beichen opened his own way of hilarious counterattack.

Shinichi Kudou, a high school student of astounding talent in detective work, is well known for having solved several challenging cases. One day, when Shinichi spots two suspicious men and decides to follow them, he inadvertently becomes witness to a disturbing illegal activity. Unfortunately, he is caught in the act, so the men dose him with an experimental drug formulated by their criminal organization, leaving him to his death. However, to his own astonishment, Shinichi lives to see another day, but now in the body of a seven-year-old child.

Perfectly preserving his original intelligence, he hides his real identity from everyone, including his childhood friend Ran Mouri and her father, private detective Kogorou Mouri. To this end, he takes on the alias of Conan Edogawa, inspired by the mystery writers Arthur Conan Doyle and Ranpo Edogawa.

Detective Conan follows Shinichi who, as Conan, starts secretly solving the senior Mouri's cases from behind the scenes with his still exceptional sleuthing skills, while covertly investigating the organization responsible for his current state, hoping to reverse the drug's effects someday.

Tarou Sakamoto was considered the greatest hitman of all time. Feared by many, he stood at the top of the underground world until he met and fell in love with a woman. As a result, Sakamoto abandoned his life of crime and now works as a convenience store clerk. Leaving his shady past behind proves more difficult than Sakamoto initially imagined. Many of his former rivals and partners do not believe that he has truly left the business and show up in hopes of taking him out. Barred from killing, Sakamoto must find creative ways to subdue his enemies and prevent them from bringing harm to his family, his store, and the small town he resides in.