Yuma, a regular college student, found himself abruptly thrust into another world. As a typical protagonist in an isekai story, he received extraordinary cheat-abilities and looked forward to starting a fun new life. However, to his dismay, he was met with cruel and callous treatment instead. His captors mutilated his body, causing him immense fear and pain, yet he was unable to die due to his "immortality" ability constantly regenerating his body. He was reduced to a test subject to be experimented on by fascinated researchers. Thankfully, his life took a turn for the better when he encountered Eva, a stunning girl also confined within the facility.
