Set in the not‑too‑distant future, for Akira Mizutame, a gifted young researcher who invented Salt, a domestic helper robot in the bustling city. After a string of unsuccessful prototypes he finds himself stalled again. A companion proposes that he could "boost" his personal life by building a romantic partner. Akira creates an artificial companion, No. 0, who immediately assumes the role of his girlfriend. Struggling between her coded emotions and her own developing feelings, No. 0 confronts an inner turmoil. Will affection grow between the two, or will Akira"s deep reluctance to connect keep them apart?
