Lol... He is a transmigrator right? But it seems out MC here dont read novels... He seriously ask other people if they have systems... Plus, did he only watch the first season of the anime? Did he continue watching? Did he even played the games?
Go for longevity! But how it exactly works? He have 120 HP so his life expectancy is 120 yrs or you thought of some fancy mathematical formula to calculate this stuff?