Ubel Blatt

Übel Blatt (ユーベルブラット, Yūberu Buratto) is a Japanese manga series written and illustrated by Etorouji Shiono. It was serialized in the semi-monthly seinen manga magazine Young Gangan from December 2004 to 2009, when it was transferred to Monthly Big Gangan where it continued until its end in March 2019. Its chapters were collected in 24 tankōbon volumes by Square Enix.

Source: Wikipedia