The Japanese teacher is learning more about his students, and on a trip to the high school he gets to meet their older sisters. Funco, Eru, and Sigu lead a group of elementary guns on a volunteer cleaning trip.

Funco, Ichiroku, Eru and Sig go on a camping trip in the mountains where they do some fishing in the river, smash a watermelon and relax in a hot spring. Later as the girls turn in for the night, Funco and Sig make a promise that they’ll always be together.