Reborn as a Round-Headed Old Cat: My Hisses Make Me Stronger, and I Make a Pact with the Campus Belle

Transmigrate into a high-martial world, transform into a round-headed orange cat, and obtain a System that makes you stronger whenever you hiss? With nine lives, hiss at a powerful person, get beaten to death, and still receive massive rewards?! "...Did a human come up with this premise?!" "What are [Hagimi] and [North-South Mung Beans] in the System shop? Can eating this stuff restore health?!" "Seriously, bro! Just because I like listening to Hagimi music, you turned me into Hagimi?!" "A round-headed orange cat... Isn't that the octogenarian cat?" Faced with this ridiculous from-the-start scenario, Chu Sheng is somewhat distraught. But what is done is done, and he has no other choice. "Fine, I'll find someone to hiss at and give it a try." [Ding! Host, you have one free opportunity to contract a cat slave! Spirit-beast tamers? We are going to make cats tame humans!] "Oh?!" Gu Qinghan, an Emperor-level spirit-beast tamer and the Human Empress! After living again, she lucks into an S-rank contracted-beast cub! She swears to make up for her regrets and achieve the divine realm! Just as she is about to sign a contract with the S-rank cub, a round-headed orange cat crashes through the window. "Hisss!!" Gu Qinghan: "???" "Where did this wretched cat come from? How dare you hiss at this Empress? Are you asking to be beaten to death?!" Chu Sheng: "Hisss!!" Gu Qinghan: "..." Just as she prepares to beat this wretched cat to death, she suddenly feels a soul mark appear in her mind! "What is this... a cat-slave mark?!" "You wretched cat! What did you do to me?!" Chu Sheng: "Hisss!!"