My Son Mozai Has the Potential to Become a Great Emperor!

[Complete] I was born as Mordred (male) in a modern world crawling with Heroic Spirits. But... aren't there way too many Artorias in this world!?

"Mordred, your 14 dads have started a Holy Grail War to fight over you! Oh... your mom's trying to sneak in, too."

This book is also known as "EX Rebellion Stick!!!", "No Dads Allowed", "My Mom Is Morgan le Fay", "Clarent Wants to Get in the Scabbard Too", "Dads Who Refuse to Lose at Anything", "A Tiny Ray of Light, Take This", and "The 21st Century Is Teeming with Ahoge Faces".