Kang Yoojin, an unmeasurably powerful guide, is pretending to be a powerless guide a.k.a. a Zero. He quietly works for a pharmaceutical company developing drugs for enhanced guiding. All he wishes for is to live an ordinary peaceful office life…

Until—
Daniel Miller, a dangerously handsome S-rank Esper, suddenly appears and threatens to blow his cover.

Please… just let me quit already!