"I Was Alone. ~A Thirtysomething Man Eats with a Demon Girl~"

Hayami Seiichiro, 29 years old, single. No girlfriend. His hobbies are eating out and reading one book a day. Seiichiro, who loves his alone time dearly, would gaze with a smile each day at the dishes laid out on his solitary dining table. One day, Seiichiro suddenly and by chance summons a demon from the demon realm. A demon girl who calls herself Lilith tells him she will grant him one wish. Later, Seiichiro would look back and wonder: why on earth did he make such a wish? This is a story about a man in his late twenties eating meals with a demon girl. That's all there is to it.