Seijou Seikatsu Normal Life

Aya Umeda is a single mother who lost her husband 15 years ago. She lives with her unemployed, reclusive son and two cats. She just wants to live a comfortable, normal life, but life is not that easy. One day, her son gets a job at a strange company and comes home with a strange invention...!? (Source: Akita Shoten, translated)