[Under-editing] Taehyung, an orphan and mischievous young boy, fell in love at first sight with Jeon Jeongguk, promising that one day he would marry him. Years later, Taehyung enrolls at Seoul National University, where his life intertwines with Jeongguk, a literature professor, and his twin, Jungkook.

When love feels like sin. How long can they fight temptation?