Summer Nights (Book 1)

When Yeon Jun flees from his complicated relationship with his sister-in-law/ex girlfriend, he finds himself in a beach town, outside of Seoul. It is there that he meets Diana. Due to unforeseen events, they end up sharing a camping car for a week. The two gradually grow close and despite their problematic relationships, they hook up with the knowledge that it is nothing more than just a holiday fling.
When their time comes to an end, they go their separate ways. But Yeon Jun can't forget about Diana. When he hears that his cousin is getting married and he is one of the groomsmen, the last person he expects to see is Diana, who is about to marry his cousin.