Face the mysteries of the secret society, investigations and magic in One Day in London. A real visual novel created for lovers of reading, watching a beautiful picture and listening to good music. The main character will be an English gentleman, who teaches at the university during the day, and visits themed evenings in the evening. But on a certain day his head is visited by the idea of summoning a demon, which greatly enthralls friends. From this moment the events begin to unfold so rapidly that it is important to understand in a timely manner who the friend is and who is ready to kill now.