Jangyaku ~Nerawareta Sadoubu~

The person who controls the square table controls everything ...
Power is justice!
The source of power is violence and money!
Gambling produces money... and mahjong is the best for it!

Agaru Yasuda enters Tekka Private School with the ambition to establish his control over this place. With mahjong as weapon he deprives tea club members of property and even friends. He gains ultimate power over these people - the power to rob, humiliate, and trample everything!

[From vndbreview]