Bang Bang Knock

26-year-old university student Gong Woo-Jin accidentally receives a package meant for his rather loud neighbor. When Woo-Jin goes to return the package to its rightful owner, he finds Yoon Yoonoh in a compromising situation... What awaits Woo-Jin and Yoonoh in the future?

Note: The chapter count includes 2 side stories and 4 special chapters.