Not biological sisters / non-biological sisters / long-coveted / restrained and forbearing older sister x unaware flirtatious younger sister. Late at night, Zha Baomei tells her sister about a friend's love story. A sister dies and falls in love with her sister-in-law B, who marries a rich woman; the rich woman dies suddenly, and she gets together with her stepdaughter. She turns her head to look at Zha Jingheng sleeping beside her, pokes her shoulder with a finger, and teases with a hint of provocation: "You've been abstinent all these years, could it be... that you're hiding some unspeakable hobby?" Zha Jingheng gives her a deep look. Later, outside the banquet. They hide in the shadows of an empty corridor, and Zha Baomei is gradually forced into a deeper corner, her back against the cold wall. Zha Jingheng's eyes are red, her voice low and trembling, "This is my hobby..." She leans down, grabs Zha Baomei's wrist that tries toZheng Tuo, and uses a kiss to stifle all sobs and struggles. The wind rustles through the trees, like a cover-up, like an echo. The courtyard is full of shadows; in this dark place where no light reaches, all unspeakable desires break free from their cages. Wildlife animal photographer X senior engineer. PS: Mutual top has stages; marking mutual top because it exists, this story leans toward age-gap older, those who prefer pure mutual top may not enjoy it.