This is an old, old, old doujin I found in my stash.
It was one of the first I found when I started hunting doujins down the net back in 2005.

I recently checked and it is CONFIRMED : This is an EARLY DASHIGARA 100% doujinshi !!!
You can check by yourself on page 4. Just next to the title "Before Nightmare", there is a box containing 4 kanjis that can be read as "Minpei Ichigo", the alternate name for Dashigara 100%.

About the STORY :
Sophitia is captured while she was bathing by a mysterious man, with the help of Lizard Man.
This fat old and ugly dude will train the lovely Hephaistos priestess in the arts of sex.

About the QUALITY :
Sorry for the quality, but there was no other copy on the net. In fact, this doujinshi seems to have completely vanished and is almost impossible to find !

ENJOY ! :-)

If this is truly Dashigara, it must be pretty old indeed, as it does not look at all like him/them.

Base +13

Any way we could get a Torrent?

Base +7

@OmegaSin : I understand your doubt, but there is a proof ! :-D
Take a good look at the contents of page 4.
On the UPPER LEFT CORNER there is the title "Before nightmare".
On the UPPER RIGHT CORNER (just next to Sophitia's head), there are 4 kanjis in a black box.
Those Kanjis can be read as "Minpei Ichigo", which happens to be the other name of Dashigara 100% ! :-)

Yeah, I know it doesn't look very much like him but, hey, This was made several years ago ! (probably around 2005).
Good old Dashigara was probably just starting his drawing job.

I always had a doubt this was an early work of Dashigara 100% because of 3 things :
1 - the way Sophitia was drawn reminded me Ayane in "Never any Volleyball" and "Ayane Gaiden".
2 - the fonts Dashigara used to write the text inside and outside the balloons are always the same.
3 - the male character looks a lot like the "average fat and ugly Oji-san" that Dashigara always draws as a sexual partner for his heroines (with the only exception that he usually draws them without ANY facial expressions).

Base +6