Tetsuwan Birdy

Meet Tsutomu and Birdy - a boy and a girl from opposite ends of the galaxy with nothing in common. Tsutomu was an ordinary high school student. Birdy is a maverick Space Federation Officer equipped with superhuman strength and, as Tsutomu soon finds out, a devastating energy blast. Now they share one thing: Their body. While apprehending an alien criminal hiding on Earth, Birdy accidentally blasted Tsutomu, killing him instantly. Now, Tsutomu must "time-share" his body with Birdy. And when she isn't controlling him like a marionette, he's unexpectedly transforming into a girl right in front of his friends and family! This series is the second version of "Tetsuwan Birdy" and was serialized under the same title as its predecessor.