The Life as a Fly Fisherman

One day, an angler met a mysterious fish.
In spite of some experience of fly fishing,
he had a hard time for a while,
feeling as if all his technique had been made fun of.
Finally he caught it.
Then another tough fish appeared
in front of the triumphant angler.
Thus worthy fish of trophies
have trained him all the time.
This is a record of the angler
who has spent most of his life fishing those fish.