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改编自同名网络漫画的《善意的竞争》是一部悬疑心理惊悚片GL(GirlLove)作品，讲述了曾是高考出题委员的爸爸突然去世后，转学到首尔名牌女高中的涩琪与全校第一名也是实权人物Jay成为朋友，但越接近Jay，她的内心和死亡秘密就越来越暴露。

　　Marco (Mario Casas) is a young businessman who manages one of the most successful technological companies in the world, ALVA, which has just launched its latest prototype into the market - CYCLONE, an electric car propelled by turbines that turn wind into energy. His friend and classmate Diego works with him, along with the latter's wife, Bárbara, the efficient marketing manager of the company. Eva, a young, ambitious engineer who has a lot to hide, also joins the team, and she will disrupt the balance at work, both emotionally and professionally, between the two business partners. In spite of being a popular guy, Marco, unlike Diego, doesn't have an exciting social life. He is a solitary man, and no one has access to the intimacy of his soul, apart from his psychologist, SARA, on whom he is emotionally dependent. Marco is haunted by a huge number of ghosts from his past and, although he tries hard to scare them away, he only finds comfort in sport and in frequenting a private club. People go there just to get pleasure and give free reign to their wildest erotic fantasies, without fear of falling in love, as everyone has to wear a mask to hide their faces. But everything changes when Marco meets Carol, the new educational psychologist who looks after his brother José, an 18-year-old boy with problems of autism, with whom he has a difficult relationship. With her, he will also meet his worst enemy - himself. Thanks to her, he will discover that it is never too late to love, even if it brings some pain along with it.

车顺奉（柳东根 饰）的妻子很早就过世了，留下了三个孩子车康心（金贤珠 饰）、车江宰（尹博 饰）和车达峰（朴炯植 饰）。经历了数不清的艰苦岁月，车顺奉总算是把三个孩子给拉扯养大了，然而，随着时间的推移，车顺奉发现自己和孩子们之间的关系却越来越淡漠。                                                                      　　车康心是职场上的女强人，尽管事业经营的风生水起，但感情生活空白的她免不了遭受他人的风言风语。车江宰即将到来的幸福生活被一个他毫不知情的“私生子”给全部打乱。车达峰庸庸碌碌，却情场得意。当车顺奉得知自己患上了绝症时日无多之时，他决定使用“不孝诉讼”，给自己的孩子们上最后一堂课。