I had been secretly dating my junior coworker Mina Kitano as lovers after she confessed her feelings to me. But half a year ago, a colleague I'd long admired confessed to me, and I decided to start a relationship with her instead—because I didn't want to be unfaithful. Using that as my excuse, I unilaterally ended my physical relationship with Mina and stopped meeting her outside of work. She looked a little lonely, but accepted it without complaint. After that, we returned to a simple superior-subordinate dynamic. One day, I secretly checked her phone. There, I found intimate messages between her and another man... Even though I trusted her... Even though I loved her so much... Overwhelmed by uncontrollable emotions, I stepped outside and suddenly found myself thinking of Mina again... I, who for a year had nearly daily sex with my mistress, spoiled by her like an animalistic male instinct, indulged in justification for cheating, fulfilled my trashy, despicable desires...