My Mom Is Now My Friend's Girlfriend, So...

"Hey, I love your mom. Mind if I go out with her?"
Kousuke is taken aback when from Takashi tells him about his secret love.
It didn't seem like anything changed, but in truth,
Kousuke got stiff at the thought of his busty mom getting busy!

Son: Kousuke Kiyasu
A regular boy attending school in the city.
A loner than mostly spends lunch drinking juice and looking at his smartphone behind the school.
His parents divorced 10 years ago, so he was mostly raised by his mother.
Her large breasts sexually awakened him. He secretly has eyes for her...

Friend: Takashi Hamada
Kousuke's best friend since they were young. Their bond is strong.
A handsome and outgoing guy that's had girlfriends, but none that have stuck.
His mother died when he was young, and his father is often away on business.

Mom: Mikie Kiyasu
A single mother. Is 36, but looks much younger. Despite her slender body, her breasts are huge.
As a result, Kousuke, his friends, and most other men tend to ogle her, though she doesn't notice.
She's thankful to Takashi for being so close to Takashi, and views him like her own son.

* This work is a parental cuckoldry manga.
Kousuke is jealous that his best friend gets to plow his mom, but also gets hard watching them.