Joo-hyun, the child who was raised with the support of Won-seo's father. After becoming an adult, he moved overseas, and it seemed unlikely that they would ever see each other again. However, one day, he suddenly returns to Korea and moves into Won-seo's house. His irritating attitude, flippant tone, and rebellious demeanour—even the way he plays the guitar—are all things that Won-seo finds utterly distasteful, yet he cannot simply ignore him. Their relationship was so strained that Won-seo could only breathe when he was relieving his pent-up emotions on his bed. However, one day, when Won-seo felt an unexpected sense of betrayal from Joo-hyun, he felt a deeper anger than ever before...

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