In Douluo Dalu, What Is This Supreme Dou Emperor System?

Lin Chen transmigrates to the Douluo World, but awakens a Trash Martial Soul so rare that one appears only once in ten thousand.

Luckily, he awakens a System at the same time, so his future still looks bright.

But the moment he hears the System's startup announcement, Lin Chen's mind goes blank.

[Supreme Dou Emperor System successfully activated. This System will guide its Host to become the Supreme Dou Emperor!]

Wait, isn't something wrong here?

What the heck is a Dou Emperor?

I'm in Douluo Dalu, not the Dou Qi Continent, for crying out loud!

Then the System issues a quest.

[You ranked last in the Dou Qi test. Your fiancée thinks you're useless and wants to break off the engagement.]

[Quest: Shout to your fiancée in front of you, “Thirty years east of the river, thirty years west of the river. Don't look down on a poor young man! Remember, today it isn't you who is casting me aside. I'm the one casting you aside!” (Time limit: 30 seconds.)]

[Quest reward: Increase your cultivation to the third level of Dou Power!]

Lin Chen looks at the old village chief trying to comfort him and falls into deep thought...

(Multiple heroines, no harems, and he doesn't join a group.)