Oretama

Japanese Title: オレたま

English Title: My Balls

Plot
The fate of the world rests on one man's shoulders. Or, to put it more exactly, it rests on his balls. The Queen of Terror has been sealed away inside of Satou Kohta's balls in order to prevent her from wreaking havoc around the world. However, all is not well in Kohta's pants. A devil named Elyse has been sent to Earth to release the Queen from her unusual prison—at any cost. Elyse only has 30 days to make Kohta ejaculate in order to free the Queen. The battle for mankind has begun—in Kohta's pants. The future of mankind rests... on Kohta's balls.