Some parts of the Denki-gai manga are outstanding, like ch.44. Some are so-so, even poor (anime creators had a good sense to maneuver around some of them, in particular Tai). The ch.44 is in v.8, which I just ordered at Amazon.co.jp. It would never occur to me to do, if I did not read the scanlations.

UPDATE FROM AMAZON.CO.JP: The original Sensei-chan says:

あと うみくんはおっぱいをムリに大きく描こうとするフシがある｡｡｡

自分の好きなおっぱいを描けばいい