Tremble All You Want

Yoshika Etō (Mayu Matsuoka) is a 24-year-old account who has never had a boyfriend before. She still dreams of being with her middle school crush, whom she calls Ichi (meaning "number one"), although they have not talked in years. At work, a man she calls Ni (meaning "number two") starts showing a romantic interest in her. She begins spending time with him outside of work, even as she still daydreams of being with Ichi. When she is alone at her apartment, she spends her free time researching extinct animals on Wikipedia, especially ammonite fossils, going so far as to order a fossil through the mail.