Do S na Seitokaichou-sama ga M Note ni Shihai Saremashita.

ドSなマイナ会長サマがMノートに支配されました。

Souta Mouri, a man who is intimidated by the Head of Intra-school organization (OSIS) named Maina and her assistant named Shino. Souta is treated like masochist rubbish and humiliated only as a mere entertainment for the Head of the OSIS. However, it did not last long after Souta accidentally found Masochist note in the trash. He devotes all his frustrations to the note. Instantly, it all happened as he wrote in the Masochist Note. (Source: Translated and Edited from Nekopoi)