I Failed to Build a Harem, Just as I Thought

This book is also known as: "A Background Character Could Never Be a Background Character, So She Can Only Get By Beating the Sudden Arrivals," "Even Chuunibyou Girls Need Sisterly Rice," "Kaguya's Revenge," "Even If It's Aqua, I Still Want to Bang Her," and "The Readers' Great Typo Battle."