https://www.dlsite.com/girls-pro/work/=/product_id/BJ396765.html
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I'm a married woman, but I'm a magical girl.

Kasumi, a 26-year-old housewife, is a married woman who is having trouble having sex with her husband, Takeru, who has been married for two years.
But her true identity is... Rainbow Star, a magical girl who protects peace with her outrageous costumes!
Her nemesis is a group of monsters whose power is amplified when they mingle with Earth women.
One after another, these handsome monsters attack her, caressing and humiliating her in the most exquisite way.
She has a loving husband, and she shouldn't feel it, but... her body can't resist...!
But what was watching from the shadows...Takeru...?
Rainbow Star can't escape the sweet sensation even when she realizes that her husband is watching her.
Oh...don't look at me...Takeru...!"
What is the fate of Kasumi, who is exposed to immoral pleasures today, with her marital troubles and a big secret?
The soaking wet NTR battle of a magical girl in her twilight years is about to begin!

The husband liked it, so the heroine will probably save her husband from his lack of sexual desire, with the help of the villain...

Base +14, Fofotron +10