Straddling a man on the sofa, Nagisa-chan says, "Smell my breath properly," and makes him sniff her halitosis. She sticks her tongue into his nostril and whispers, "It's exciting, right?" The sensation of her rough-surfaced tongue going in and out of his nose feels amazing. It's a blissful time being tormented by her nose while she blows breath you'd never imagine from her cute face. She even praises him, saying, "Good boy for sniffing properly." He could keep sniffing this for hours. With Nagisa-chan's bare skin pressed against him, he just has his nose licked endlessly. In this situation, an erection is unavoidable.