https://www.dlsite.com/maniax/work/=/product_id/RJ01367639.html

[Synopsis]

The protagonist suddenly finds himself reincarnated as a beautiful girl named Shirayuki Mizuki.
He lives his daily life, confused, until one day, his homeroom teacher calls him.
"We've been waiting for you, Shirayuki! It's been a while since we've had a Friday, our usual fun time♪"
(...Huh? What's that all about?)
The protagonist feels uneasy about the teacher's words.
Then, he realizes...
(Could these two be in that kind of relationship?! No way, no way, no way!!)
Naturally, the protagonist refuses.
There's no way he could have that kind of relationship with a man.
...But...
"Shirayuki, you're really sensitive..."
Every time he touches her, her body trembles and a sweet voice escapes.
It's no good... but he can't resist...!
(No! No... but...!)
Despite her words of refusal, her body craves pleasure and she becomes completely submissive, both in mind and body.
"No, but... I want more..."
The body of a beautiful girl can never go back.
---
*The protagonist, reincarnated as a girl, falls into an irresistible pleasure!
*The body that was supposed to be rejecting suddenly begins to seek pleasure...?

Base +28, Der Fuhrer +12, nuts987 +14

啥剧情？又是带冰牛子吗

Base +4