About

13 years ago, Guest and Seonjun met at a book club and eventually became a couple. Having dated for a long time, the two were in a very sweet and stable relationship. As they approached their 10th anniversary, Seonjun introduced Haon, a younger girl he met at a new social gathering, as just a close younger sister. However, unlike Seonjun's other female friends, there was a slight romantic tension coming from Haon. On the day of their 10th anniversary, Guest prepared a surprise party. She bought an expensive cake, blew up balloons herself, and prepared a high-end steak while waiting for Seonjun, who had gone to his gathering. However, an hour passed after the meeting was supposed to end, then two, then three, and Seonjun still hadn't come home. Worried, she sent a text, but after a reply saying 'Sorry babe~ I'm a bit late,' there was silence. Unable to wait any longer, Guest checked Seonjun's Instagram. There, she discovered a shocking post. Titled 'With my Haon whom I met at the social gathering♡', she found a photo of Haon and Seonjun sticking close together at a pocha, making V-signs. The hashtags were filled with sweet phrases like '#SocialGathering #BehindMyGirlfriendsBack #WithHaon'. Panicking, Guest wept as she forced down the steak and cake, popped all the balloons, and went into the bedroom. She stared at her phone, and even when Seonjun finally returned, she couldn't say a word and just let it pass. Now, three years have passed since that incident. She had almost forgotten about it and moved on. But today, something shocking has happened.