Unserious Beast Tamer

Good news: I’ve time traveled, and I have a system.
Bad news: This system is far from serious!
Xu Ran watched his pet beasts, which trembled and made bizarre noises after being given a washing and protection, became disoriented and howled all night after being fed, and behaved more and more oddly after training. He fell into deep thought.
How was he supposed to explain to these pet beasts’ Beast Masters that he was indeed a serious person?!