First, I should confirm the correct title. The user wrote "Seefure" but the correct term might be "Seifure" or another variation. Also, "riyuu" could be a misspelling. Let me verify the actual title. A quick search shows that "Boku ni Harem Seifure ga Dekita" is a manga, and there might be an anime adaptation. However, the "riyuu" part is unclear. Maybe it's a subseries or a light novel?