Moufu Oneesan no Atatamekata  

The Way Miss Blanket Warms me Up, 毛布おねえさんの温めかた, Moufu Onee-san no Atatamekata, How To Warm Up Your Blanket

"I'm a god with a blanket that was born to warm you up."On a certain day of winter, Minato, a boy who's particularly sensitive to cold, will meet a mysterious woman that will warm his heart to the core!(Source: Kadokawa, translated)