The Glass Greenhouse!

Sci-fi apocalypse + yandere romance + one-on-one pairing + cyberpunk + descent into darkness + ensemble cast [Brooding, obsessive yandere Yun Lin × unhinged, sweet-on-the-outside, dark-on-the-inside Yun Xiao] [No biological ties] We are the spark that will keep humanity alive. A single spark can start a prairie fire, and lush green grass will one day cover barren land... We were born beneath the dome and raised aboard the Ark. It is humanity's last Eden... We promise to redeem those lost along the way, for the common good of all humankind. Two hundred years ago, a virus that gnawed at the bones swept across the world, causing genetic mutations and unleashing monsters. Four great bases were built upon the wasteland to protect the last surviving humans and a civilization on the verge of extinction. Without warning, Yun Xiao entered the dome's core area and was exposed beneath the dome. At the final decision platform, she came face to face with the judge. Yun Lin saw a pair of crimson eyes as dazzling as rubies. He had to admit, those glassy red eyes, veiled in a faint mist, had captivated him with ease. It was rare to come across something so interesting. He laughed with delight. “Just who are you, little girl?” Later, he asked her curiously, “What is your Order ability?” Yun Xiao's eyes misted over, and she answered obediently, “...Foresight. What about yours?” He gave no answer. A thick pane of glass stood between them, and every unspeakable secret grew wildly inside their glasshouse...