Mangaka: YUUKI Masami
Summary: �Meet Tsutomu & Birdy - a boy and a girl from opposite ends of the galaxy with absolutely nothing in common. Tsutomu was an ordinary high school student. Birdy�s a maverick Space Federation Officer armed with superhuman strength and - as Tsutomu soon discovers- a devastating energy blast.
Now they have one thing in common: Their body. While apprehending an alien felon hiding out on Earth. Birdy accidentally blasted Tsutomu- killing him instantly. Now, Tsutomu must �time-share� his body with Birdy. And when she isn�t yanking him around like a marionette, he�s transforming into a girl in full view of his friends and family!(Summary from http://tetsuwan_birdy.tripod.com/)

Volume 1 ch1
Volume 1 ch2
Volume 1 ch3
Volume 1 ch4
Volume 1 ch5
Volume 1 ch6
Volume 1 ch7