Natsumi - Before My Granddaughter Becomes an Adult

"If Grandpa starts saying weird things, don't mind him," Dad told me one day. But what is dementia? Is Grandpa senile...? An old man's love for his granddaughter escalates! When no one's around, they bathe together and wash each other. He invites a friend over to show off his cute granddaughter, and the three of them play. "Keep this a secret from Mom and Dad, okay?"