Love in the Storm
Pinoko becomes friends with a boy named Cinque. When she gets home, the letter she starts to write is a love letter. Curious, Black Jack asks her who the man is, but she refuses to tell him. After this, Pinoko goes on a date with Cinque, but Black Jack is not impressed. Treated like a child, Pinoko decides to become an adult and starts to act grown up by wearing makeup and adult clothes. Then, on the night of their umpteenth date, a sick person is brought into Black Jack's house. It turns out to be Cinque...
Aired 18/04/2005EP 23 - Love in the Storm
Black Jack (TV)
Black Jack is an "unregistered" doctor with a clouded, mysterious past. He works with his little assistant Pinoko (who has a massive crush on the doctor), dealing with medical cases not very well known, which can be strange, dangerous, or not known at all. But he is a genius, and can save almost any of his patients' life (as long as they have the money for it, that is), and is known to many around the world, especially to those of medicine and science. He's a man of science himself, and does not believe much until he has seen it, yet it is many times he is surprised by love and nature often overpowering the science he bases his life in.
(Source: Anime News Network)