I suspect the author is Ryoji Nomura, but I am not quite sure, that's why I won't dare to tag it till I get a second opinion.

I'll go out on a limb and speculate it's an early work of his, from before breasts and hips exploded in his art. It's the way faces are drawn.

CinderBH said:
I'll go out on a limb and speculate it's an early work of his, from before breasts and hips exploded in his art. It's the way faces are drawn.

You mean the good old Nippon Ichi days? Yes, most likely.