Denchai, a socially awkward 30-year-old IT specialist, often goes unnoticed by his coworkers unless they require technical assistance. His monotonous life takes a turn when he encounters Nui, a new addition to the Marketing team, who makes him feel appreciated. Denchai yearns for Nui to be his partner, even if only for a single day. During a company outing, Nui suffers an accident that results in temporary amnesia, lasting just one day. Seizing the opportunity, Denchai deceives her by claiming to be her boyfriend and that they had planned a trip around Hokkaido together. Would you gamble everything for a fleeting day of love?