To repay the scholarship for college, a young man named Ao starts doing 'papa activities.' Amidst anxiety and tension, he goes to the house of a man who will act as his 'papa.' However, his insecurities, particularly his large nipples, are meticulously stimulated, causing him to begin feeling an unfamiliar pleasure… Under the slow and steady 'Dad's' blame, blue eventually developed around his nipples, leading him to start going to the man on his own.
