Haru Inui, 27, works hard in both her personal and professional life. One day, however, she runs into her boyfriend using Haru's apartment as a love hotel with another woman. "I was such a fool to believe him...” Just as the heartbroken Haru loses trust in a man's declaration of "I love you," Okuma, a junior at work, suddenly confesses his love to Haru. In order to convince her of his sincerity, Okuma promises to tell her that he loves her once a day from the bottom of his heart. This is an office love story full of surprises from Okuma, the bold junior colleague who will proclaim “I love you” anytime and anywhere! (Source: Comic Zenon, translated)