A high school kid dies in the first five minutes because he was in the wrong place. Birdy, the Federation agent who killed him, has to cram his consciousness into her body to keep him alive, now they share one form, and neither can tell anyone why. The show trades the usual "reluctant partners" setup for something meaner: two people who actively despise each other, trapped in genuine physical proximity, forced to solve crimes while Tsutomu's life literally depends on not getting caught. The comedy lands hardest when the stakes are highest. By the end, you understand why this pairing had to happen exactly this way, and why neither of them would choose it again.

Tsutomu is just another high school student grinding through exam prep when a chance encounter with a fleeing criminal turns into something far worse: accidental death. The silver lining comes courtesy of Birdy Cephon Altera, a Federation agent pursuing the guy, who finds a way to save him. His consciousness survives by merging with her body, an arrangement neither of them planned. Now Tsutomu shares a single body with an alien law enforcement officer, so whenever Birdy goes after interplanetary fugitives, he is along for the ride. On top of that, Birdy works undercover as the model Shion Arita, which means the pair must juggle Tsutomu's school life, a modeling career and an increasingly dangerous Federation job all at once. The result mixes sci-fi action with comedy drawn from their strange situation.