Ten years ago, Won Tak, Min Joo, Eun Kyung, Chang Kyung, Se Joon, and Se Ra were inseparable childhood friends who shared every moment of their lives. As they grew into university students, their bond remained unbreakable, or so they thought. Now, secrets they've kept hidden resurface, weaving a complex web of tangled emotions, first loves, and deep friendships. It turns out that even the closest friends can harbor significant secrets.