We recently reported about Seo Seung Ah and Ahn Yong Joon's split after nearly 2 years together. However, their names are making the news again due to the reason behind the break-up. Personality differences? Well, that was what HE said. This is what SHE revealed. On November 20th, a representative of Ahn Yong Joon said, "The two broke up 3-4 months ago due to irreconcilable differences." In a later interview, he said that he would like to remain silent regarding the break-up. Netizens were all sympathetic of their split, until now. On the 21st, Seo Seung Ah revealed the 'uncomfortable truth' through her minihompy, in which she said that, 'He cheated on me." In her minihompy, she wrote: "The lies you said in order to hide the fact that you were cheating on me were even greater." On the 20th, she even said, "Ahn Yong Joon probably brought out he subject of our break-up after four months because he has a new movie coming out." Now, if Seo Seung Ah's words are true, then Ahn Yong Joon will be in a very uncomfortable situation, however, if Seo Seung Ah is lying, then this issue may go out of hand and even fall into the hands of the court for public slander. Aside from legal issues, netizens are simply disappointed by their immature quarreling. The fact that an ex-couple that dated for nearly 2 years is arguing publicly made the netizens look down upon their behaviors. The sympathetic attention of fans became a lose-lose situation for both actors. Meanwhile, Seo Seung Ah also wrote, "I don't want to be caught up his (Ahn Yong Joon) company's press play anymore. I cannot stand the shameless and blunt articles using our split for more publicity." So, who's telling the truth? Was their break-up due to their irreconcilable differences? Or was it due to a two-timing cheater?