Detective Haika

Detective Conan is an Anime, a manga, a game, that tells about a teenage boy named Shinichi Kudo shrunk by a pill called APTX4869. This happens when Shinichi is on a date with Ran Mouri, his childhood friend. He spotted a suspicious person during their date, he left Ran and followed the person, later, he was hit by the suspicious person's accomplice. These suspicious persons are part of a group named Black Organization. Worried about Black Organization secrets spoil to the police by the teenage boy, the organization force him to drink APTX4869. They thought it would kill him, but it shrunk him into a little kid instead.

Shinichi Kudo then, stays at Prof. Agasa's house for meantime and attends Teitan Elementary School in the name of Conan Edogawa. Conan have friends that help him figures out the truth in most of the cases. Conan and his friends are detectives wanna-be, they called themselves as Detective Boys. Ai Haibara is one of them. Unexpectedly, Ai Haibara turns out to be part of Black Organization who makes the APTX4869. She decided to left the organization and went for help to Shinichi Kudo. Ai and Conan both stay at Prof. Agasa's house. But sometimes, Conan stays at Ran and her father's agency. 

Using Prof. Agasa's wristwatch to put Ran's father, Kogoro Mouri, to sleep, and Conan uses Prof. Agasa's ribbon to make his voice same with other people's voice, then he starts solving case one by one, day by day... While his goal is still the same, to uncover every truths, capture the Black Organization, and get back to his original form.
Too bad that this game's is in Japanese version, it didn't translated into English, so that I can't really understand the game story. Though I really want to know the story when Conan is versus with Kindaichi.