[CLANNAD fanfiction + time travel + single female lead + dream fulfillment + delinquent academic genius + semi-yandere character + slice-of-life + sweet romance]

[Not having watched the anime or played the game won't affect your viewing experience]

The world was originally incredibly dark, a bottomless abyss, but until I met you....

Beautiful and lovely girl, you are the light in my heart, illuminating the shadows within me...

Please forgive my actions, and please don't cry. You are the most perfect person in my heart...

Time may wash away memories, snow may cover everything, but you are the one I dare not lose...

Please guide me for the rest of my life.

[Slice-of-life story + no female lead + research]

Lin Yi, whose love for astronomy is etched into his soul, is born into the HP world with all the knowledge from his previous life and a super brain that can "remember everything he sees".

He thought he could easily become an academic star in the magical world, but he discovered that wizards' understanding of the brilliant starry sky above them was still stuck in the primitive stage of "divination of good and bad fortune".

How can we tolerate this?

With a wave of his wand and a telescope in hand, his goal is to elevate astronomy from a "required, easy subject" to a "cutting-edge magical engineering" capable of changing the magical world!

From drawing precise star maps imbued with magic to developing powerful spells that draw upon the power of the stars;

From analyzing the probability theory behind divination to creating astrological artifacts based on constellations...

While Voldemort and his followers were still obsessed with pure-blooded people on Earth, a scholar under the stars was quietly turning the entire universe into his magical laboratory.

This is the story of a hardcore academic genius who, in a magical world, uses scientific thinking to climb the magical technology tree, and incidentally crushes everyone else in the process.

[A work signed by the First Editorial Team of Qidian]

I have half a scroll of a book, which I call "transformation" in my carefree spirit.

We wave to ask the immortals and Buddhas to retreat, and send this to the gods to hear.

The ink's fragrance is heard in songs, its essence transmitted through the mysterious and profound. ...

Yan Qing's younger sister descended to the mortal realm to undergo tribulation, but was framed and reborn as a tragic supporting female character in every lifetime. To save his sister, Yan Qing, a retired master of quick transmigration and now a max-level expert, embarks once again on a world-traveling journey, fiercely protecting his sister and exacting revenge on his foes. And then—...

[Lighthearted, silly, slice-of-life, double transformation, and lots of sweet moments]

What's it like when an ordinary guy turns into a cute girl?

At the beginning, the school beauty and I accidentally swapped identities...

Detected to have entered another world. Please select your cheat:

[Soul Forge: A forbidden magic sealed away, it resurrects the target from death, turning them into a war machine that slaughters all life. It will chase life, absorb life, and kill life.]

[Energy Transfer: With each attack on an enemy, you learn one more thing about their weaknesses.]

[Dimensional Power: A unique power possessed by Time Hunters, who draw upon the power of the creatures they slay to strengthen themselves.]

...

Upon entering the instance, please select your cheat:

[Ghost Swordsman Trial Ticket: The Cursed Ghost Hand Swordsman]

[Sharpshooter Trial Ticket: A warrior who utilizes celestial technology and firearms as their primary weapons for ranged combat.]

[Lancer Trial Ticket: A champion who emerged alive from the Imperial Arena, a spearman who fights using a long spear.]

...

After each instance of cheating was discovered, Mo Hao began to wonder what other games were installed on his computer.

I switched to a bottom-tier summoner, but no one wants to team up with me, so I can't clear dungeons.

Lin Xiao awakens the Golden Legendary Talent, gaining one S-rank talent every day!

Grant your summoned beasts the talent to evolve!

A death knight who has acquired the [Killing Intent Wave] talent leaves nothing but desolation in their wake!

The slime, endowed with the "Gluttony" talent, devours everything and grows infinitely!

A goblin who has acquired the [Weapon Master] talent can control all weapons and use them at his disposal!

A savage minotaur who has acquired the [Soul of the Machine] talent...

Talents can even fuse and evolve!

[Bleach] [Emperor] [Black Butler] [Royal Treasury]...

Lin Xiao is invincible on the path of a summoner.

Team up? Teammates?

I am a team all by myself.

Genius, prodigy?

You can't even beat my weakest summoned beast, yet you dare to call yourself a genius?

As the abyss descended, Lin Xiao alone stood in front of it, forcing the abyss back for thousands of miles.

A demon god has descended upon the world?

We'll beat him so badly he won't dare show his face!

The gods have revealed themselves, and thousands worship them?

There are no gods, they are just my summoned beasts.

In his previous life, Lu Xia unexpectedly obtained a Xuanwu pendant. He thought it was a fake, but it turned out to be the real deal. So, out of desperation, he had no choice but to take it with him and was forced to travel to the world of Quanfa.

However, during the awakening of magic, an unexpected event occurred, and he actually awakened the water element, one of the three useless elements in the early stages.

Lu Xia initially thought he could only stay behind the scenes, but after unleashing his magic, he suddenly realized how short-sighted he had been. Who says water-type characters can't be main damage dealers?!

Facing the group that had looked down on the water element in the past, Lu Xia only had one thing to say: "Try hitting me once!"

Years later, facing an overwhelming army of demons, Lu Xia only said one sentence: "Who dares to strike my shield!"

"What? You're saying everything will be fine if you don't hit me?"

"Hilarious! Magic changes in an instant, why can't I take the initiative to attack?"

This book is also known as "I Play Shield Counter in All of France", "With 100% Counter-Thrust, I'm Invincible", "I Wear Thornmail in All-Round Mage", and "Who Says a Defensive Mage Can't Carry?"

P.S.: While ensuring the protagonist's safety, try to salvage all the tragedies in the original story that can be avoided.

[Lighthearted Slice of Life] + [Single Female Lead] + [No System] + [No Rebirth]

Jiang Ning is an obscure online novelist who is passionate about romance novels.

Because his parents were going back to their hometown to visit relatives, the task of taking his younger sister to school for registration fell to him.

What I thought was just a regular school registration was actually the beginning of a new chapter in my life.

Jiang Wan: "Brother, do you like Teacher Zhang? I think Teacher Zhang is great, and I want her to be my sister-in-law!"

He refused to let his sister be his wingman, but he couldn't refuse her insistence.

Thanks to her younger sister's tireless efforts, Jiang Ning went to school every few days and her interactions with the homeroom teacher became increasingly close.

Until one day in the future, Jiang Ning received another call from his homeroom teacher, asking him to come to the school.

Jiang Ning: "Teacher, I'm sorry, my sister has gotten into trouble again."

Class teacher: "No, your sister has been behaving very well lately and hasn't caused any trouble."

"So why did you call me to the school?"

"I miss you, is that not allowed?"

After officially getting together with her homeroom teacher, Jiang Ning became increasingly skilled at writing romance novels, which unexpectedly became popular.

Seeing that Jiang Ning's career was on the right track, his mother began to urge him to bring his girlfriend home.

When Jiang Ning brought his girlfriend home, his mother was stunned.

You were asked to take your sister to school, and you started dating the teacher?

The mischievous and fun-loving female protagonist is still gradually developed into a perfect goddess.

This is a lighthearted and enjoyable read for single readers. If you like this type of story, feel free to jump in!