My childhood friend Nami came to stay over at my house because my parents were on a trip. We were so close as kids that we even bathed together. But Nami, who has grown up so much, is completely different from how I remember her—and before I know it, my heart is racing. I can't help but reach out to Nami, who has grown so much and has a huge bust, but she gets angry. It's supposed to be just the two of us for a sleepover, but things are getting awkward...