Trainer, the Strongest in the World!

In the elven world, humans relied on the power of mechanics to build six cities. What about the beastmaster? Royal, unified. To control beasts is to control all beasts. Abandoning the weak elves and capturing the powerful elves alive and enslaving them is what most beast masters seek to achieve by "efficient use of contract positions". Dong Mian finds it hard to agree with this. During a transaction, he ate a colorful fruit: [Trainers share the magic of protecting their master dogs: Explosive Flame Gun] Then let me ask you, how can you become the strongest by simply enjoying the abilities of elves? "It's very simple," Dong Mian thought to himself, "It's not like I want the elves to share my abilities!" Beast master? No, it's a trainer! The powerful magic inherent in the elves causes the heavens to move, and the trainers are also capable of slaying the stars with one sword. ——Kouya is the trainer who can beat both elves and himself invincibly. ....... Introduction 2: This is the story of a trainer who got involved with his six children and spread the correct method of using "Elf Contract Magic", and then became lawless. (Some trainers don't teach it completely, so I take it for granted)