She was just the quiet girl in the hoodie.So why are they all starting to fall for her?Even the one who shouldn’t.Yoo Mirae didn’t belong in a mansion.She didn’t belong in designer school uniforms or classrooms filled with heirs and future CEOs.She was just a poor girl from the outskirts of Seoul — quiet, curvy, invisible.Until the day her mother married into one of Korea’s richest families.Now, Mirae is living in a world of glass walls and whispered secrets, trapped under the same roof with four powerful boys — and all of them are watching her far too closely.Her stepbrother, Kang Joonseo: cold, famous, untouchable… and the one who looks at her like he’s already claimed her.Baek Taewoo: the flirtatious heir who plays games with hearts — and is ready to play hers.Seo Rihan: the brilliant, elegant student council president who seems to know everything… except how to ignore her.Jin Harim: the boy with the sweetest smile — and a gaze that lingers just a second too long.They shouldn't want her.She shouldn’t want any of them.But secrets have a way of slipping through locked doors… and so do hands.