Eun-won has been living with his secret crush, Woo-seok, for a year. In truth, he’s not really an older “brother” but an older man... Still, to stay by his side, Eun-won disguised herself as a boy and became his roommate. She had hoped for a campus life full of heart-fluttering moments, but everything changed after a club party, when a drunken Woo-seok ended up spending the night with her. Now, with Woo-seok acting as if he remembers nothing, Eun-won is left confused and conflicted. In the end, Eun-won makes up her mind to sleep with the drunken Woo-seok once again… "Hyung... no, oppa—do you want to sleep with me?"