Fate: A Hero's Forbidden Conquest

Why is it considered "pure love" to like single girls, but not when it's married women? Pure love isn't something so restrictive! My feelings for married women are pure and beautiful, it's their husbands who are clearly standing in the way of my pursuit of true love! Besides... There are countless rivals when chasing after young girls, but for married women, there’s only one rival! I’m too weak to take on many opponents, so I’ll just choose the one! ... Haruka Kasugano transmigrated into the Type-Moon world of 1994. He awakened the Cao Thief System: the more famous figures from Type-Moon he "greened" (cuckolded), the stronger he would become through rewards! And so, Haruka Kasugano began his performance. "Madam, you wouldn’t want to..." Before long, renowned figures like Tohsaka Tokiomi, Emiya Kiritsugu, and Kayneth found themselves with fields of green sprouting above their heads! —For extra chapter's before upload come over to my pat! +20 Extra Chapter's! — patreon.com/SpiritVerse6