Orichalcum Reycal(2006)

Orichalcum Reycal

Sakugi Mitsuaki is a poor college student who gets hooked on figure modeling. In return for helping his class he receives some special putty -- but the figure he builds with it suddenly comes to life. The figure is a life force called Orichalcum ("Oriharukon") that fulfills the wish of its creator. Their strange life together begins

From mangaupdates.com