Comment by Jade on Ai o Ataeru Kemonotachi - Vol.1 chapter 2

@Jade

Please go read the summary 👀he's 40 years old doctor and when transported to a different world his body became younger

@Jade His soul is 40 years old. His 17 in physical form, which means he looks 17 but the actual age of his soul is 40. Since he transporter to a different world, it would only make sense that time would be different there.