From limited link above, you can see "Douga process" this shot.
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I got some messages from who want to be Douga-man in the future. I'm so impressed and so happy! If you want yo try to do in-between job yourself, you could use his Genga above for practice. I have gotten a permission about this from him. You also can check beautiful her Douga (in-between) work from the link. Takahashi san is one of the staff Studio Bulldog and the most greatist Douga-man I have ever met.
If you want to know how to draw good Genga, please look at point of "layout" and "position of Genga" and "shadow" carefully. He focused character's face was always on the screen so that audiences can feel his emotion clearly. This is a good layout meaning on this shot.
By the way, I'm preparing discord community in Patreom now. Please wait. Thank you!