الحلقة 4: تشارك بوبوكو وبيبيمي في مختلف المنافسات والمعارك خلال رحلتها بالقطار.

4

The girls play jankenpon against each other. Popuko gets on a bullet train to Kyoto, and enters a Train Battle with Pipimi. Popuko wins a competition. Popuko throws away random junk. Pipimi defends Popuko from a rude teacher. Pipimi tests Popuko's eyesight. The girls fight each other for clout. The girls write Senryuu. Pipimi is the detective in an old adventure game. The girls battle each other with "dumbass personalities." This episode features a third special collaboration segment with Square Enix. (Source: Wikipedia)