https://www.dlsite.com/maniax/work/=/product_id/RJ01435414.html
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_638361/

中編
https://e-hentai.org/g/3717295/433aa0711c/

Base +28

The author is at a standstill as to what to do next even though Akane hates her uncle? We know she'll end up falling for him, regardless of what happens.

Base +6

[Synopsis]

He kisses her for the first time—the top student of his class and with excellent grades.
Excited, he pushed her down, but she stopped him, confused by this first experience.
“Sorry... but someday... okay...♡”
The heroine (Akane Haruno), who doesn't know anything about sex and wants to appear cool in front of her boyfriend, consults her uncle (Toru Okuma), who always tutors her.
Okuma has always been interested in Akane's large breasts, so he decides to show her an adult video.
He flaunted his erect cock, made her jerk him off and before long, Akane squirted all over Okuma's palm.
When he tries to penetrate her, she refuses, saying, “I want Yu-kun to be my first...”
With no other choice, he teaches her how to masturbate and since she won't let him penetrate her, makes her deepthroat him, ending the day that way.
During her first time with her boyfriend, Akane eagerly gives him a blowjob, just as Okuma taught her.
After making him cum with the blowjob, she finally tries to have him penetrate her for the first time.
But her boyfriend's dick, having already ejaculated once, won't get hard and she gives up.
Later, when Okuma comes over and immediately asks if it went well while sexually harassing her, Akane lies and says “it went well” because she doesn't want him to touch her.
“Where does the pen you usually masturbate with hit deep inside? Answer me, and I'll stop doing dirty things.”
When she answers honestly, he says, “Your uncle's is about this big, I guess.”
He flaunted his cock, which was overwhelmingly bigger than a pen and fully erect.
Fearing she'd lose her virginity to Okuma like this, Akane remembered that after giving her boyfriend a blowjob and making him cum once, he couldn't get hard again right away.
She suggested, “If it's with my mouth...”
Okuma ejaculated from the blowjob but Akane despaired at his cock showing no sign of softening.
As he tried to force entry, Akane blurted out, “I want Yuu-kun to be my first!” confessing it hadn't actually gone well before...

Base +31

What does Japanese translation mean? You are a funny guy indeed.

Base +3, red3oyy +6