《只是相爱的关系》讲述了一群面对惊涛骇浪依然坚持隐忍，虽然看起来微不足道却更显伟大的人们的温暖爱情故事。

该剧是讲述因为过去的杀人事件而过着交错的生活的男女之间的曲折命运。
张基龙饰演警队出身的警卫蔡道振一角，他积极向上、充满正义感。
秦基周饰演李泰梨一角，受妈妈的影响，梦想着成为演员，虽然遇到了残酷的事件，但最终成功成为演员。
南多凛、柳翰庇饰演男女主角儿役。
许峻豪饰演连锁杀人犯，是联系男女主的“关键人物”。

Set in a village right after the Korean War, poor but good-hearted Heo Sam-gwan sets out to win the most beautiful girl in the village, Heo Ok-ran, by selling his blood to earn money. Years later, the two are happily married with three children, but their family undergoes a crisis when Sam-gwan's eldest son doesn't resemble him and rumors spread about the boy's paternity.