C433 Ruthlessness towards oneself

Walking into the river, I began my second training in fighting in the water.

"The first punch!" The second punch! "The third punch! …"

When I reached the eighty-sixth punch, my body was already exhausted. I had been showing signs of collapsing, and no matter how hard I tried, my arms just wouldn't be able to lift up.

Now that I'm in such a state, I can clearly feel that my body