24Hours★Innocent Girl ~ A Slightly Dangerous Summer Vacation ~

The woman you saved during a walk was a mermaid.
Days with innocent Yulia, who knows little about human society.
What kind of future awaits us…?

On a summer day after being dumped by Akiho—rumored to be the biggest slut in your club—you meet a girl at an amusement park pool.
The girl introduces herself as Mayuka and makes an offer for compensated dating. Bewildered by the proposition from such an innocent-looking girl, you still carry the lingering expectation of getting to sleep with Akiho, and end up making a mistake…
A strictly business, money-driven relationship with schoolgirl Mayuka!

In a quiet, somewhat remote town, Hannah lives with her father and younger brother. Eventually the summer break comes, and with it the question: "How to spend the last summer before her senior year in high school?" Explore Hannah's town and its surroundings, and find out what opportunities may hide there.

I was wondering how to spend my university summer break—having no particular plans—when my roommate Akira suddenly transformed into a girl due to "TS Syndrome"!
Apparently, if you reach climax 100 times within 30 days of the transformation, your gender becomes permanent...!?
And so begins a steamy summer life with this newly minted girl...
Even though she's a girl now, she was originally a guy with a keen interest in sex;
there's no way she's going to just sit around and do nothing after transforming, right...?
Thanks to the transformation, she can experience things that were off-limits to men...
It would be a waste not to take full advantage of that female body!
Visit the women's bath, beauty salons, lingerie shops, and more!
Now that she's a cute girl, she wants to get down to business!
She wants to secretly show off her sexy body... That's it—let's get naughty on a secret social media account!
You can't do anything too extreme at first, but as things heat up, you'll be able to take all kinds of risqué selfies...
She's curious about her female body, but masturbating in front of her roommate is a bit much... better to do it secretly when alone...
You can even try out various masturbation techniques by ordering adult toys online!
With libidos running high due to TS Syndrome, and both of them being sexually curious, there was never any chance they'd choose *not* to have sex...

Many women around the world have become infertile for some inexplicable reason. All hope for the continued survival of the human species has been lost... until now. During your summer vacation, you were forcibly taken to a hospital where it was explained to you that you have special semen that is the cure to the infertility issue. The salvation of many women depends on you. During your summer vacation, you are free to do whatever you like, such as getting a part-time job, falling in love and getting married, paying for girls with money, becoming addicted to gambling, and even committing crimes. Or, you can even save the world. This is your summer vacation after all, so spend it however you like! Explore various activities, including womanizing, sex services, gambling, tattoos, crimes, and interior decorating. Most women have certain conditions to meet, such as having the right techniques, a certain amount of money, or a particular weakness, in order for you to persuade them to have sex with you. Spy on, blackmail, or prank others. Commit crimes like stealing desserts or abusing authority, but beware of jail time. If the fear of a criminal record won’t hold you back- do as you please!