But Imaria is a work where Takeda hadn´t yet exaggerated with proportions. (He increased them progressively as we can see in his later works)
Just look at Ajisai and Himawari Ovas, Antechinus made Natsuha and Hisato proportions according to what we can see in the doujin, and a bit thiccer imo.
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(In fact, Natsuha´s breasts are bigger in the ova)
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Psdt: I love how they managed to adapt Takeda's drawing style to animation, it's fucking perfect.