Naughty Younger Boy, Don't Run, Sis

[Younger, Darkly Obsessed Puppy Who Crawls in the Shadows x Cold, Sweet Older Sister] Gu Ye's love was never a passing whim. It was a madness he had plotted for a long time. He hid the obsession in his eyes and pretended to be obedient and harmless, slowly working his way into her life until he became the closest person to her, her little "brother," and finally got what he wanted: to be with her. But Wen Xu's heart had never lingered on him. Sweet and proud, with a streak of coldness deep down, she had been with him on a whim. Once the novelty wore off, she broke up with him decisively. She could not even be bothered to say goodbye; she only wanted to pack her bags, fly to M Country, find somewhere peaceful, and put the whole thing behind her for good. She thought their relationship was no more than a brief interlude in her life, but forgot that the seemingly aloof young man had already gone mad with love. On the night she had dinner with her friends and family before leaving, Gu Ye blocked her path. The moment the door closed, all his pretenses shattered. With red-rimmed eyes, he held her tightly and demanded, each word seeming to bleed: "Sis, you said proper goodbyes to all those people who don't matter. What about me?" He listed all the ways she had been "cruel," humble as dust yet obsessive to the extreme. He trapped her in this house, filled with their memories, his eyes alight with an all-consuming madness. "Sis, don't even think about running away. Without you, I really will die."