Because Saikawa was so obsessed with Kanna, they became best friends. Until one day, Kanna and Saikawa held a candy party every day just for the two of them. They brought so many cakes and candies and ate them together, making them start to get fatter and rounder.

Saikawa: Aahh... Look, our bellies are very fat. But you're much fatter, Kanna... Kanna: ooohhh... fatter... keeps eating Mmm... Saikawa: Yeah, try this one... this cake is very delicious... continues eating