The man in this happy couple, who had already met each other's parents and were planning to register their marriage the next day, requested an investigation into his infidelity. Over the past few months, she had been coming home late from work and hadn't been replying to LINE messages, and it seems he happened to see her contact with a man he didn't know. So, to investigate what was going on, he decided to follow her on the days she always returned home late... The video footage of her infidelity, which was seized from the other man, will now be exposed to the whole world.