Beast Taming Patrol

When Lin Su discovered he could travel between two different worlds with his tamed beasts, the world gained a Beast Tamer formidable in a way that defied science.

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Without a system, without a female lead, Crossing Two Realms, original taming beasts
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This book is also known as "Beast Taming Science," "Smuggling with Balls," "The Unloading Routine of a Tool Ghost," "I've Crossed Over, and I'm Faking It"