In any case.
Shinpachi has a prompt for the drama CD because they don’t want it to be like their usual drama CDs (which doesn’t actually have a storyline). It is: Have a secret XXX for Kagura. The story proceeds and is mostly a Dragon Ball parody.
It is Kagura’s birthday, and everyone is keeping her present a secret from her. She starts realizing that everyone is hiding something from her as she meets several characters, Otose, Otae and Kyuubei, Kondou and Toujou, etc.
Then she meets the Shinsengumi gang. (12.05-13.44)
Okita: Wha-What..It’s China…
Kagura: Oh…what were you hiding just now?
Okita: Hiding? What are you talking about?
Kagura: Liar! Everyone’s weird today! You all have been hiding something!
Gintoki: After that, Kagura finally realized the truth.
Okita: Che…It can’t be helped if the secret is leaked out… I’ll tell you the truth.
Shinpachi: Huh? Is it really okay to leak it now? Everyone’s been trying so hard to keep this birthday party a secret from her…
Okita: The truth is… I was only trying to hide Hijikata’s corpse.
Shinpachi: YOU WERE HIDING THAT!! And isn’t this guy a policeman? Why is he exposing such an awful thing?
Okita: I couldn’t find a place to hide it, so I decided to kill Hijikata’s body. (Barasu=expose or kill)
Shinpachi: That’s not what I meant!! Why does this person have a heart of a criminal?!
Hijikata: Um… no… I am not dead by the way.
Okita: Zaki, go do some self-studying later.
Yamazaki: Please promise me something, Captain Okita, after I leave, the vice-commander—
Okita: Yeah, you are the captain of the first squad.
Hijikata: What sort of underworld society is this? What kind of terrible things are you all planning?
Okita: Just shut up. Dead people should keep their mouth shut. I’ll kill you.
Hijikata: Killing me after I die – that’s strange!
Yamazaki: Anyway, let’s not do this outdoors…
Kagura: Who says so. I’ve got no interest in the Shinsengumi. You all are overtly self-conscious, you idiots!! (runs away)
Everyone gives Kagura her present (dragon balls) during the party. It’s Okita’s turn to give her the last dragon ball. (20.35-21.15)
Okita: China, this is the last one. Use it with care.
Kagura: Even if you give that to me, it’s not like I will be happy! (cries tears of happiness)
Shinpachi: What. Why are you talking so nicely. It’s kinda gross.
Okita: Don’t get it wrong. It’s not really for you. This… this was Hijikata’s last momento… (crying)
Hijikata: Don’t go off and kill me!