Virus Tensei Kara Isekai Kansen MonogatariThe Isekai Pandemic Special, Corona-chan's adventure in another world! ; The Otherworldly Infection Story that Started with a Virus Reincarnation ; ウイルス転生から始まる異世界感染物語

I was supposed to be dead, but when I woke up, I was a rat! ...or, more accurately, I became a virus-infested rat!! The more I infect, the more bodies and skills I get! I'm going to cause a pandemic in this other world!