Amaha chan has been gradually doing more and more erotic IV, and the way she does it is comparatively progressive. For this IV, she managed to also ultilise some kind of ASMR for some scenes, which makes it more immerse personally, and taking advantage of her cute voice.
However, fair to say that now she is more grown up and having shown more trace of her appeal as a lady now.
In conclusion, highly recommend this Video.