魔滅の剣姫伊月の性事情〜女扱いされない歴戦の爆乳退魔剣士を年下雑魚な俺が下克上種付けで孕ませメスに堕す〜
The Sexual Affairs of Izuki, the Demon-Slaying Sword Princess ~A veteran demon-slaying swordsman with big breasts who is not treated as a woman is impregnated by me, a younger, weakling, in a subversive attempt to turn her into a female~