Katagiri Teppei (Takuya Kimura), who works in an advertising company, has a free and uninhibited personality. He always has difficulty communicating with his colleagues in the creative department. His boss angrily transferred him to the sales department, where he needs to bow and scrape to customers. This is an unlucky day. For the sales department assistant Uesugi Riko (Takako Matsu), this day is also gloomy. She has just been dumped by her boyfriend. The two met at the bus station, sang K and opened a room to spend a night together, but nothing happened. The next day, Teppei met Riko again in the sales department and found that they were colleagues, and the lively and lovely Riko was very popular with colleagues. Teppei has always been obsessed with his high school girlfriend Mizuhara Sanae (Risa Junna), and they met again on this day. Teppei was very happy. The married Sanae tried hard to hide the problems in her marriage, but she couldn't stop herself from getting closer to Teppei. Riko has already fallen in love with Teppei and has done a lot for him silently. Teppei also feels particularly happy when he is with Riko. When Riko asked Teppei for a confirmed relationship, Teppei backed off. Riko bought Teppei's favorite book and told Sanae that she would give it to Teppei personally. Sanae used tricks to make Teppei accompany her all the time and missed the date. When Teppei arrived at the date, she was gone. But Riko's confession was played on the big screen. Teppei was deeply moved by Riko and confessed to her in the same way. The two fell in love sweetly, but Teppei, who was used to being free and easy, was not sure that he could stop like this. Riko was discouraged by Teppei and resolutely resigned and returned to her hometown, waiting for Teppei to make the final decision.