Seonghyeon, the older boy next door who had always cherished and cared for Yeonwoo, returns to Korea after ten years away. Contrary to his expectation that Yeonwoo would warmly welcome him back, Yeonwoo avoids him and treats him with awkward distance. Feeling hurt, Seonghyeon drinks too much and ends up visiting Yeonwoo’s house. Following a strange sound coming from somewhere inside, he opens a door and discovers something unexpected. “Baby… why do you have a vagina?” He uncovers the secret Yeonwoo has hidden for so long. Terrified that Seonghyeon will hate him, Yeonwoo trembles in fear. But when Seonghyeon instead embraces and comforts him, Yeonwoo slowly opens his heart. From that day on, their relationship deepens and eventually turns romantic. But their peace is short-lived. A stalker who knows Yeonwoo’s secret begins to invade their quiet lives, pushing the two into a dangerous new situation—and threatening to destroy the life they built together.
