A genius inventor, who is still a high school student, has a girlfriend two years older than him. One day, he invents a time machine and attempts to go two years back into the past, to become the same age as her.

However, it is she who ultimately uses the machine to travel through time!

A handsome detective, Kudou Yuusaku, receives phone calls from a mysterious woman day after day, with a new case each day. He of course solves them one by one. But the biggest mystery is who is this mysterious woman?

Keisuke, a young man of 17, accidentally activates the Earth Destruction System. The destiny of the Earth now depends on whether he can stop the system within 24 hours. However, suddenly amnesia strikes him and he forgets the pin number to stop the system. The time is running out...

A girl is fleeing from men in black. She runs into a detective agency and discovers that the detective there is a super-miniature-size, cool dude. He risks his life trying to solve a case for this client. Will they come through in the end?

Meet Baby Conan!

Yukiko Kudo is looking for her missing husband. The only clue to find him again is to decipher a mysterious message left for her. Their baby, Shinichi Kudo, one who later becomes the famous high school Detective Conan, will at this age already be offering some important hints for her.

Thanks to the mystical powers of a Cherry Blossom Tree, a 70-year-old man with a secret sword technique goes back into the past and becomes the same age as his granddaughter. While enjoying his youth for the second time around, he notices that a player is after his granddaughter.