Nabe Girl's breath hitches as the mechanic's rough hands brush against hers while he shows her how to change a tire. She imagines those hands on her body, his callouses grazing her sensitive skin. Nabe Boy watches them, jealousy and arousal warring within him. After the mechanic leaves, the siblings act out their fantasy, Nabe Boy playing the part of the mechanic, his hands mimicking the expert touch they've witnessed, while Nabe Girl moans, lost in her forbidden daydream.