Ren'Py / VN

Natsumi Love Story [v0.5.0] [Steradianfauns]

May 23, 2025F95

Natsumi Love Story is both an open-world dating-sim visual novel, or a simple visual novel, depending on which type you choose to play when you start the game. It is no longer a kinetic visual novel as there will be multiple routes and multiple endings now.

You as the main character are just an average male student.
That is until a truck hit you and Isekai’d you- no, just kidding.
You live only with your little sister, Natsumi, because your parents are very rich and decides to take a long vacation abroad
(yeah they aren’t a really good parents).

The difference between you and Natsumi are only 1 year, so you’ve grown very close.
Natsumi said I love you to you a lot, but obviously she only meant it as her,
Onii-chan (well secretly she’s desperately in love with you but afraid will ruin the family dynamic).

On a certain day, she decides to risk it all and confess to you in the most straightforward way.
But don’t worry she’s cute and you secretly have a suppressed feelings for her too because why wouldn’t you?
She’s cute, and who wouldn’t want to be the target of someone who is desperately in love.

She’s trying to get better though, and your job is to help her get better while receiving a lot of love (and lust) from her.
There are multiple endings planned, one ends with you, Natsumi and a harem, one ends with you and only Natsumi, and the last one ends with dead bodies in what used to be a love nest.

The story also include a plot of fighting against NTR, in this case, blackmail attempt.
Meaning some dude will try to blackmail Natsumi, but obviously Natsumi and the Main Character will win.
I include this as my own personal justice against NTR because I really, really hate it.
So while there’s a blackmail attempt, the only time the dude will ever get to touch Natsumi is when her fist meet his nose.

There’s also another route that will prevent the NTR attempts, but you’ll still decide to remove the threat, covertly, so neither you nor Natsumi will ever be at risk at all.

So if even the mention of NTR is too triggering for you, I advise against playing this.
But if you want to see justice served against NTR, you might enjoy it.

Thread Updated: 2025-05-22

Release Date: 2024-11-25

Developer: Steradianfauns – Patreon – Itch.io – Discord

Censored: No

Version: 0.5.0

OS: Windows, Linux, Mac

Language: English

Other Games: The Daily Life of Pan Hero

Genre:

3dcg, animated, male protagonist, vaginal sex, oral sex, creampie, big ass, big tits, incest, school setting, pregnancy, virgin, yandere, ahegao, anal, thighjob, footjob

Installation:

1. Extract and run.

Changelog:

v0.5.0

– 8300+ words

– 645 renders

– 83 animations

– 10 Sexual Scenes

– About 2-3 hour of Contents

– Chapter 5 Part 1, in this chapter you’ll go on a date with Natsumi and have risky sex in various places.

v0.4.9

– 8000+ words

– 256 renders

– 48 animations

– 8 Sexual Scenes

– About 0.5-1 hour of Contents

– Extra Chapter 4.1, where you can explore spit/saliva fetish with Natsumi

– Extra Chapter 4.2, where you can roleplay as detectives having sex in public toilet with Natsumi

– Extra Chapter 4.3, where you can have sex with Natsumi when she’s supposed to be reading Replay Chapter

– Extra Chapter 4.4, where you can punish Natsumi for becoming her punching bag in your childhood by fucking her hard

– Extra Chapter 4.5, the alternate ending where Natsumi get pregnant, and you have sex with her while she’s pregnant

v0.4.6

Bugfix

v0.4.5

– 112800+ words

– 5600+ renders

– 454 animations

– 9 Sexual Scenes

– Chapter 4 Prevent Route, Chapter 2.3, 2.4, and 3.5 Extended

– Open World mode, including interaction mechanics.

– Yandere Sex

– Dynamic Sex

v0.4

– 10600+ words

– 691 renders

– 61 animations

– 9 Sexual Scenes

– Chapter 4

v0.3.5

This update contains:

– 15600+ words

– 882 renders

– 72 animations

– 14 Sexual Scenes

– Chapter 3.2 – 3.10

– Chapter 4 Preview

– Chapter 1-3 Recaps

v0.3

This update contains:

– 11236 words

– 943 renders

– 50 animations

– 10 sexual scenes

– About 2 hour of content

– Chapter 3

– 1 Extra Chapter

v0.2

– 11320 words

– 536 renders

– 57 animations

– 14 sexual scenes

– About 2 hour of content

– Chapter 2

– 4 Extra Chapters

– 7 Sex Only Chapters

v0.1

Initial Release

Developer Notes:

Fetish Include :

1. Incest*

2. Impregnation*

3. Creampies

4. Yandere

5. Ahegao

6. Virginity

7. Girl Masturbation

8. Exhibitionism

9. Internal Urination*

10. MILF

11. Sex Acts : Vaginal, Anal*, Handjob, Blowjob*, Paizuri, Footjob*, Thighjob*.

* Means Optional

Future Fetish:

1. Harem

2. Threesome

3. Yuri/Lesbian/Girl-on-girl (Skipable)

Note :

*Incest Patch (ipatch) is needed for Natsumi to be your little sister, otherwise she will be your childhood friend/best friend, some of the dialogues will be changed so no mention of it being incest at all. Unzip it and put the ipatch.rpa in the game folder (you should see other .rpa files there).

*There will NOT be any NTR on any of my stories, so even if the story is going to be like there will be an NTR, I promise you, it won’t and just a plot device.

*This is an adult game and not meant for anyone under the age of 18. If you are under the age of 18, please exit this page immediately

*All scenes including character models in this game were created by using Koikatsu by Illusion. Please support them as well.