Sumo de PON! 3 - Not about to lose edition

This is a comic in which the girl trows off the boy.

In their school, sumo wrestling is a tradition. As part of the training, there is a legendary battle contest event. So far, only two people have managed to clear it.
Just two people, in a decade old tradition which has been challenged by more than two hundred contestants.
Your job is to take on this impregnable challenge!

3 stories in 199 pages.
No knowledge of previous products is required.