Yui Matsuno, the epitome of cute and innocent, finds herself alone in her room. She blushes slightly as she remembers the naughty thoughts she's been having. Unable to resist, she slips her hand under her skirt, feeling the warmth between her legs. She tentatively touches herself, gasping at the new sensations. Her innocent explorations become more confident, her breaths coming in short pants as she brings herself closer to the edge.