SW-687 - Will you wear your old school uniform? Girls who follow me to the hotel with insane tension

While there are many works where actresses who are clearly past their prime for 'JK' (high school girl) roles wear uniforms, this one features women who are no longer students wearing their old school uniforms, which actually felt more natural and better. However, the third segment was way too short and felt like an afterthought, which is a shame. Why did they do that?