Aizawa Shouta is a part-time college student and, more recently, an EMT in training. He doesn't have the funds to call Tokyo home and never did, but how he ends up renting a room from nationally acclaimed author Yagi Toshinori is anybody's guess. Yagi is kind, and rich, travels a lot for conferences and has a very fat cat named Dumpling. Shouta loves Dumpling. He also loves leaving the door open when he's dressing, because he knows Yagi-san is looking.