Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls

[Game overview]
That's the story,
During the summer vacation, the main story is about Yoi being tricked by Ichimotsu into signing consent for sexual intercourse.

Multiple endings to choose from.
Will Ninomiya safely celebrate her summer festival with Yoi as his girlfriend?
Or...
We deliver over 55 volumes of basic erotic CG!
Check out the details on ci-en!

Character 1
Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls [Counterattack Chee Gyu]
Yoi Amagasaki
(Hiyori Amagasaki)
A beautiful high school girl who is strong-willed, active, and full of curiosity. She doesn't participate in any club activities, but she has many friends. She has sex with her boyfriend Ninomiya, whom she met three months ago, once a week. (without raw)
She is able to study and exercise, but due to a cold, she was unable to take the test and had to take supplementary lessons.

Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls [Counterattack Chee Gyu]
Rod shop Ichimotsu
(That's what he's saying)
Ueyama Nishi High School physical education teacher. He is an amateur virgin who is grossed out by his students, but he has a super big cock.
He was looking forward to his summer supplementary classes with Yoi, who is always cheerful and cheerful, but... Although he is poor, since he is a teacher, he is surprisingly kind and sociable, and gets along well with his neighbors.
She is also an advisor for women's track and field.

Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls [Counterattack Chee Gyu]
Kazuma Ninomiya
(Ninomiya Kazuma)
The main character of this work is cuckolded by his girlfriend.
(You can enter her name)
A secret character with a gentle personality.
During her summer vacation, she will be working in the fields at her aunt's house in another prefecture, so she won't be able to meet Yoi.

Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls [Counterattack Chee Gyu]
Sota Yoshino
(Yoshino Sota)
A cheerful member of the soccer club.
He is on good terms with Ninomiya.
I have a girlfriend, but I'm interested in Yoi.
He likes back fuck and spanking play.

Character 2
Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls [Counterattack Chee Gyu]
Sayo Goto
(Sayo Goto)
Yoi's best friend.
She extremely dislikes the rod shop.
She is dating Sota, but their relationship is unstable due to rough sex.
She seems to have a faint interest in Ninomiya, but...

Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls [Counterattack Chee Gyu]
Makoto Tomose
(Makoto Tomose)
A girls' track and field club member who is friends with Yoi and Sayo.
She has relatively large breasts, but she doesn't have a boyfriend.
She has a strong sense of weakness because her advisor, Rodaya, looks at her with erotic eyes.
Her parents' home is a ramen shop.

A variety of selective erotic lessons and mini games
Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls [Counterattack Chee Gyu]
The story will change depending on the order of the classes you choose.
Marathon (rotor marathon, naked marathon, sex, etc.)
- A mini-game where you go around the truck and trigger an event. pool

(rotor swimming, naked swimming, sex, etc.)
-Mini game where you swim in the pool and trigger an event.

Inside the school building, there will be blowjobs (dick sniffing and blowjobs), sex (vibrator and sex), cunnilingus, and breast fondling.
Devil (enema torture, anal training, bondage play, deep throat, etc.)
There is no devil in the trial version.

cuckold cuckold
Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls [Counterattack Chee Gyu]
In the ADV part, get information and shut up the bratty brats!
Otherwise, she may be cuckolded before she cuckolds Yoi.
When the timing is right, let's shoot an NTR video letter and send it!
Sometimes it is important to give honey to the sun and control her heart.

Erotica and animation
Yoi's Summer Supplementary Training NTR ~ Until My Girlfriend Falls [Counterattack Chee Gyu]
As the training progresses, there will be erotic animation.
At Eroste, you can enjoy the fun of cultivating various items.
Check the student situation from a correlation diagram!