The Senpai in the same department as the new employee Shinozaki, Katase-senpai, is a short, cute, and big-breasted older sister. Moreover, she is great at giving compliments and is very thoughtful of her juniors. Sometimes she pats his head, and there's even some gentle Power Harassment that you'd want to receive more than anything in the world!? A Loli-kei Senpai like this, isn't she just the best!?