Model Ren is covered in Nutella in a bikini.

First she makes a cute heart and dips it in chocolate. Next she dips her hand in chocolate and makes a hand licking gesture. She applies a little bit on her body. Here is a strange thing: the Nutella you see on umd from other members is a thick liquid, but the Nutella sold in Japan somehow tends to harden... it doesn't look like everyone else's.

I was topless, but I was able to spread it out and cover my head with the liquid chocolate, not losing to the hardening chocolate.

Once you become a chocolate person, you put the chocolate in your mouth. Finally, they cover themselves with chocolate from the head. There is a scene where they are posing for a photo at the end.