Cool Shock B.T.

Magic Boy B.T (魔少年ビーティー mashounen bīteī) is a short Japanese manga series written and illustrated by Hirohiko Araki and was published by Weekly Shonen Jump from 1982 to 1983. The manga is split into 6 chapters, contained in 1 volume.

Araki's other manga, Gorgeous Irene also features Araki's other works including Magic Boy B.T.

Synopsis
The creator of Baoh and Jojo's Bizarre Adventure presents a manga about magic and mysteries! You'll meet him at 13:13 pm, on Friday the 13th. He'll do an uncanny intro where he plays a trick on you! And wherever he goes, trouble seems to always follow. Who is this person who creates such incidents? None other than Cool Shock BT!

Trivia

 * The main character, BT, has a similar appearance and stature to the Jojo's Bizarre Adventure main antagonist, Dio Brando and may be a possible reference to the character.