How to make a cover art for Megami(女神, Goddess) ; Dazai Osamu's Short Stories Collection. 
Publisher: Takanashi Shobou（小鳥遊書房） 
This book will release in the end of December, 2019. 

1st step / rough sketch. Made with Adobe Fresco.

When I draw circle on Fresco, I use circle ruler of drafting tool.

2nd step / made with Fresco, too.

3rd step / book design. Made with Adobe Illustrator.