Nui ni Koishite Ii desu ka?

Seishun Scans: Ikumi is a high school girl whose hobby is making stuffed toys. When she is rescued by Ayato, an elite student at her school, she decides to give him a handmade plushie as a thank-you, but she witnesses him secretly throwing it away in the shadows. Then the "curse" of the plushie is activated, and Ayato is turned into a doll... Taken from: Comic Natalie.