Shokushu Ningen ~Nurse no Itoko Hen~

Once every 97 years, the Tentacle Tree bears fruit. One man ate that fruit to see if the legend was true. Its transformative powers made him a human monster. You are the hero! You are... Tentacleman! This time you've gotten it in your head to stealthily receive an examination from your sexy, beautiful cousin who is a nurse at the central clinic.