At Itsuboshi Trading Company, the second sales division is led by Makoto Takanashi, a forty-year-old top-performing sales executive whose charisma and appearance drive nearly every woman in the office to pursue him. Despite his flawless professional reputation, Takanashi harbors a secret he is too embarrassed to address: he has been suffering from erectile dysfunction for over a year, leading him to turn down every romantic advance. His subordinate, twenty-six-year-old Ren Hiwatari, outwardly presents as a cold, ruthlessly efficient worker—earning him the nickname “absolute zero man”—but in truth he has secretly admired Takanashi since the older man helped his family during a crisis in his childhood. When a complaint about Hiwatari’s icy demeanor prompts Takanashi to take him out for a private dinner, Hiwatari inadvertently discovers Takanashi’s ED secret and, to Takanashi’s astonishment, his own presence unexpectedly restores Takanashi’s ability to achieve an erection—symbolically visualized throughout the series by the recurring appearance of Tokyo Tower in the background. Hiwatari eagerly offers to help Takanashi overcome his condition, and the two begin a clandestine arrangement that blurs the lines between mentorship, medical assistance, and deepening romantic attraction. As they grow closer, Takanashi develops genuine feelings for Hiwatari, while Hiwatari struggles to confess the long-held adoration that has defined his entire adult life. The comedy-driven narrative follows their bumbling yet heartfelt attempts to navigate office politics, external pressures—including a persistent female director who pressures Takanashi—and their own insecurities. Takanashi is later selected as the company’s advertising face, thrusting him into unwanted public attention, while Hiwatari’s jealousy and feelings of inadequacy lead him to pull away, culminating in a temporary separation. After a series of misunderstandings, the two reunite in New York on Christmas Eve, finally consummating their relationship and becoming official lovers. Rumor of Takanashi’s impending marriage threatens their newfound happiness, but they overcome the obstacle together. By the final volume, Takanashi has been promoted to department head, Hiwatari undergoes a personal and professional transformation, and the couple commits to a shared future. The series blends workplace comedy, light erotic elements, and a slow-burn romance centered on an age-gap relationship between a dashing older man burdened by a shameful secret and the fiercely devoted younger subordinate whose icy exterior melts only for him.