Kaoru hates traveling in a packed train every morning, but there's one thing she looks forward to: staring at Hayato, her crush from high school, and imagining having sex with him. She knows she shouldn't be doing it, but she can't help her naughty imagination! One day, she happens to stand next to him on the train! Her dirty thoughts get out of control as her body touches his...... but Hayato starts to act strange...... He's breathing heavily, blushing and groaning...... Is someone groping him!? In her attempt to find out who the groper is...... Kaoru realizes that it's her! She's touching him between his legs! "......Are you going to take responsibility for this?" The accidental groping gives her a chance to get close to him! And her naughty fantasies come true......