The man browsing the shelves for a light novel to read said he needed to fuck her mouth while he decided, so she got down on her knees and took his cock between her lips.
His cock knocked against the back of her throat with each slow stroke as he absent-mindedly fucked her while staring at the spines of the books in front of him.
“I hope he hurries up,” she thought. “Last time he took an hour to decide and cum!”