Farewell, we see each other for the last time...

The protagonist unexpectedly becomes a private tutor for a sheltered young lady. In the secluded space they share, their hearts and bodies gradually draw closer, eventually leading to a deep, intimate relationship. This is a full-fledged Live2D interactive touching game titled Natsuiro Lesson: The Last Summer Time by The 18th Chikamichi. Using the mouse, players can engage in real-time interactions such as petting her head, undressing her, fondling her breasts, and engaging in sexual activities. As you continue these interactions, her reactions will change based on the increasing level of affection.

After defeating the Demon King, the hero Edmond and his party rescue their beloved princess. However, with the Demon King’s demise, the balance of power he maintained shatters, and darkness begins to once again shroud the land.
On their way home, the party seeks a night of peace in a hot spring town. That very night, however, a wealthy merchant, a barbarian general, and other mysterious figures all set their sights on the princess.
Amidst a whirlwind of plots and temptations, will you be able to become the princess’s guardian, fight off desire and darkness, and lead her to true happiness…?

“Onii-chan, you really are a lonely person.”
“Did you lose faith in me?”
“No. I love you, onii-chan.”
Unable to bear the ugliness of the world and terrified of other people, the protagonist develops the ability to read minds.
He shuts himself away and submits a light novel he wrote, which unexpectedly wins a newcomer’s award. But the jealousy and envy that follow only deepen his distrust of the few human relationships he still has. Those around him hurt his fragile heart without even realizing it.
His only remaining comfort is his younger sister, who lives with him.
Clinging to each other just to stay alive, the two sink night after night into a twisted, unhealthy codependency.
―I keep living alone, talking about my own prejudices and cursing the world. Day after day.
I ripped off Dostoevsky, half-assed it into something modern, and turned it into a light-novels.
I mean, I tried. In my own stupid way.
Had the heroines talk about “existentialism” like it was supposed to mean something.
■Game Overview
The gameplay is an old-school, straight-up classic visual novel. The text fills the entire screen, so read as much as you want—or just right-click to hide it and enjoy the art. That’s it. Read, click, and vibe.
Live through a gloomy, suffocating real world through an overly sensitive protagonist… then come home and savor the only happiness left in his life: the time he spends with his little sister, his one true comfort.
As the friction with the people around you keeps piling up, there’ll be moments when their petty thoughts make you feel actual murderous rage. And in those moments, you can use your mind-reading ability to drive them to suicide.
That snide bastard. That arrogant asshole. Hit them right where it hurts—right in the deep-seated insecurities they never want anyone to see—and take them out. It’s not like you’re killing them with your own hands, so you won’t get caught. The ones truly at fault are the tasteless, mindless conformists who do nothing but obey society without a shred of aesthetic sense.
…But is that really okay?
What is happiness, anyway?
And in the end—what kind of future will the protagonist and his sister walk into?
Witness it with your own eyes.

The Last Sovereign is an adult fantasy RPG that plunges you into the saga of a world torn between forces of lust and purity. As you enter the complex conflict, you forge a new path that will change the course of history!
...maybe. The thing is, acting like most heroes gets you killed, and most evil overlords' plans make no sense. The Last Sovereign is a game that twists your expectations for adult games, while fully embracing a reconstruction of some familiar old tropes to provide a lot of fun, sexy content.
By telling a story that has sex as an integral component, The Last Sovereign offers a deep storyline that naturally includes adult content. Not only will you adventure in a world where sex is a weapon, you'll build a harem of fully-realized characters with their own reasons for being with you... in and out of the bedroom.
Features
- Over 50 hours of gameplay.
- No grinding or random battles: finite enemies visible on map.
- Over 250 sex scenes, over 200 fully illustrated, including over 1200 images total.
- Manage the differing opinions and priorities of 20+ harem members.
- Invest in over 150 different assets that have an impact on the plot and provide financial returns as the story progresses (Chapter 1+).
- Negotiate deals between kingdoms and organizations, shaping the course of nations and religions (Chapter 2+).
- Upgrade and customize a home base (Chapter 4+).

Second year at school, mid-July.
You've been dating your girlfriend, Ayaka Asada, for almost a year.
One day, after her soft tennis club practice match, Their bedtime phone calls begin to gradually change.
Their voices become more husky, they let out troubled sighs, their responses become slower,
There are more and more silences for no apparent reason...
 
Even when they meet at school, she seems uneasy, as if she's hiding something.
At the same time, she begins to show the protagonist a sexiness and behavior he's never noticed before.
A strange feeling he doesn't recognize.
Doubts he wants to deny.
But even so, everyday life quietly becomes distorted.
And on the final day, the relationship between the protagonist and Ayaka will change forever.