Obtaining Seven Rainbow Empathy Dolls

-Blurb- I received a box of gifts. Inside were seven different dolls. If you removed the pacifier necklaces around their necks, they could grow bigger. One day, I met a child who looked a lot like one of my dolls. His dark eyes swept over my face, then over my doll. Though he was just a child, his gaze made me inexplicably nervous, and I couldn’t help squeezing the doll’s belly. The child’s expression twitched for a moment. Then he walked up to me and greeted me in a falsetto. “Ciaos! Your doll is so cute. Can you give it to me, big sister?” “Huh? No way. This is my favorite doll.” * After that day, Reborn finally understood the strange sensations that would suddenly appear on his body, and why he sometimes grew bigger or smaller. With a dark look on his face, he sought out the other Arcobaleno, asked how everyone was doing, and told them about the weird dolls. The Arcobaleno angrily exclaimed, “What?” “How outrageous!” “How could this happen?” But the next day, when Reborn went to see her in a falsetto, he ran into them. The seven Arcobaleno, with Luce absent and Lal in her place, had gathered outside their familiar house. They were all carrying gifts. After an awkward silence, Skull was the first to speak. “F-for the chance to grow bigger, I’ll do anything!” “...” As it happened, so would they. 1. Unless something unexpected happens, the male lead is Reborn speaking in a falsetto. If something does happen, it’ll be someone else. 2. The story centers on the heroine, with a sister-worshipping, everyone-loves-her vibe. 3. The heroine has very little empathy. Theme: Love