Reborn, I Turned and Fell into My Brother's Arms

A gentle, powerful, devoted older man × a lively, adorable sweetheart [Not blood-related siblings + childhood sweethearts + past and present lives + doting romance + five-year age gap + monogamous and devoted couple + second male lead gets burned] Zhu Nanxi must have had water on the brain in her past life. She thought that if she just persisted long enough, she could eventually win Lu Shuyu's heart. So she ended up hurting her parents, brothers, friends, and everyone else around her. Then, during the royal hunt, her seemingly fragile adopted sister drove her to the edge of a cliff and smiled as she revealed the truth: even after the wedding, Zhu Nanxi would only be elevated to the status of secondary wife. Then the girl pushed Zhu Nanxi off the cliff with her own hands. She wanted to become the true wife of the Marquis's household... After being reborn, Zhu Nanxi finds that whenever she is around her older brother, her heart races and her cheeks flush. Thinking it forbidden, she never dares to show how she feels. Then she realizes that her brother seems to keep flirting with her, his behavior full of ambiguity... The night they finally lay their feelings bare, Zhu Nanxi lifts her head and quickly kisses his cheek. After that, things spiral out of control. One day, Song Huainian pins her against the door, his hand gripping her waist as he murmurs hoarsely, “I don't just want to be your brother. I want to be your husband, too...” A few tears slip from Zhu Nanxi's eyes, but she still manages to say timidly, “H-husband...” Later, Zhu Nanxi curls up in Song Huainian's arms and says sweetly, “They were bullying me!” Song Huainian kisses her forehead and replies gently, “Then I'll make them disappear.” A secret crush comes true from the male lead's perspective; love grows over time from the female lead's. A light, sweet romance. The male lead gets a little unhinged later on. The heroine is not a strong, independent type.