ORICHALCUM REYCAL DUO

The story of the manga revolves around male college student Mitsuaki Sakugi, who makes his poor living from making figures. One day, he receives putty as a reward from his teacher after sculpting a figure that would be used as a sample in class. That night, after making a figure out of the putty he received, the figure suddenly comes to life. The figure calls herself Reycal, and explains that she is a being called an Orichalcum. She explains that Orichalcum are beings that were born to grant the wish of their maker. (Source: Anime News Network) — Description from AniList community (anilist.co).