Lalala lala lalalala
Lalalala lalala la~n
Lalalala lala lalalala
Lalalala lalala la~n
Hey, Sensei? Who's that fighter in white?
White blood cell! ......yeah, he's a hard worker.
Hey, Sensei? Who's that courier in red?
Red blood cell! ......yeah, she's a hard worker.
Hey Sensei, the scary-looking one whose hat says "KILL"...
Killer T-cell! ...yeah, yeah! He's a hard worker.
In order to protect this place's peace
Working, working, lalalala lala, our allies.
Hey Sensei, the one who's ordering attacks while adjusting his glasses...
Helper T-cell! ......yeah, he's a hard worker.
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Hey Sensei, the one who's patrolling here and there...
NK Cell! ...yeah, he's a hard worker.
Hey Sensei, the ones who fix wounds all nice and clean...
Platelets! ......ahem! We're hard workers!
In order to protect this world's peace
Working, working, lalalala lala, our allies
Hey Sensei, is it true that you're the strongest teacher of all?
Macrophage-sensei! Sensei!
Lalalala lala lalalala
Lalalala lalala~n secret
Lalalala lala lalalala
Lalalala lalala la~n lala
Lala