Tensei Kunitori Sex Gassen!!
In a certain town, news that there were many children born who retained part of their memories from their previous life spread.
Such children inherit the unfulfilled ambitions, beliefs and feelings of their previous lives, and are hence called “Revenge Children”.
Despite becoming a hot topic there were still many who doubted their existence, and as a result the Revenge Children became a myth of the town, eventually disappearing from people’s minds.
Ten-odd years later…
Out of the blue, Mizuki Ouma, who claims to be the Revenge Child of Oda Nobunaga, declares intent for world unification. Japan falls into her hands.
But Mizuki is pushed down by Takuma Sumeragi, the main protagonist plagued with an abnormal sex drive, after an unexpected incident, and this and that were done.
As a result, her battle flag is stolen. Mizuki is left with the deep scar of failure.
With a dented pride, a Mizuki burning with revenge targeted at Takuma wants to settle the score once and for all through Takuma’s area of expertise: sex.
She involves the other Revenge Children, and with both her pride and Japan on the line, commences a war of sex.
A lewd world wet with love juices and semen thus began.
天精国取りセックス合戦！！ – オープニングムービー
(18禁ゲーム)  [softhouse-seal GRANDEE] 天精国取りセックス合戦！！ 初回限定版