Quick Transmigration: What Harem? I'm Just Here to Make Up the Numbers

[Quick transmigration + a supporting heroine's comeback + cannon fodder + peerless beauty + love at first sight + no fixed male lead + multiple men competing for her + 1v1 or 1vN] Shen Su, a peerless beauty born in a laboratory, is bound to the Cannon Fodder Rescue System and transmigrates to various small worlds to fulfill cannon fodder characters' wishes. But she's only here to play a bit part, so why is everyone clinging to her? World One: She transmigrates as a palace maid in a power fantasy about a dragon among men. Does she die instantly from the start?! (1v2) Complete World Two: The annoying younger sister in a sweet romance. Brother, please don't!! (1vN) Complete World Three: A timid female cannon fodder's search for her husband in an apocalypse novel (1v1) Complete World Four: The unlucky female neighbor in a story about a male ghost (1v1) Complete World Five: The noble young masters' canary Content warnings 1. This is not a story about a strong female lead. The heroine is lazy and easygoing, doing whatever she likes. As long as she's having a good time, that's all that matters. Her attitude is: I won't agree, I won't refuse, and I won't make any promises. 2. The heroine is the most beautiful, an indescribably gorgeous woman. Everyone, men and women, young and old, will be enchanted by her. 3. There is no fixed male lead. The number of male leads varies from world to world, but every man who ends up with the heroine is chaste, and there will be no pregnancy or childbirth plotlines. 4. To be clear, this is not a story about a strong female lead, but the heroine isn't stupid. Every character exists to serve her, and she conquers everyone with her beauty. 5. The story has lots of elements, and the heroine's personality will be influenced by the original character in each world.