Mash-Up Anime: Teenage Assassin Enrollment. - Chapter 5 - First School Day End.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Ronnie, a college student with a boring life has everything around him change when his whole world is turned upside down by a woman he accidentally summons while trying to summon a magical familiar as a game.His peaceful and tranquil days are disrupted as he tries to help her fit into human society while also searching for a way to break their bond.Hell further breaks loose when he discovers that his familiar is indeed the demon queen and mysterious forces start trying to eliminate him for reasons unknown.He struggles to protect himself, adjusting to having a demon queen in his life, and understanding his growing feelings for her.

Alex, a veteran soldier, meets an unexpected end on the battlefield. But instead of the final rest, he finds himself reborn into a new world—the magical realm of Harry Potter. Now a young boy, Alex is born into a Muggle family. Yet, despite his non-magical origins, his disciplined training and fierce determination uncover a rare, powerful talent for magic. With a world of spells, wands, and ancient secrets ahead of him, Alex will need every bit of his skill to face the growing darkness led by Voldemort. It’s a time before Harry Potter’s birth; James and Lily Potter are still alive. Join Alex’s journey as he navigates his way through Hogwarts, learns the mysteries of magic, and rises to face the deadly challenges that await, determined to become one of the greatest wizards in history.

Mira was just a young mortal girl living a normal life until a god ruined everything for her.

“F*ck you, GOD! Why do you keep doing this to me!!! What did I do to deserve this?!?”

Trapped in a cycle of reincarnation, Mira continues learning and improving all in hopes of taking down her oppressor.

Follow Mira as she's thrust into a Cultivation World where the impossible is possible and reality can be whatever you want it to be as long as you're strong enough.
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Disclaimer: I don't plan on adding romance early in the novel. I will probably add some later in the novel, but it won't be the main focus. If there is any romance then it will be yuri.

This novel will also primarily focus on females. Of course, there will be males in the story, but for the most part, they won't be important characters.

Patreon: https://www.patreon.com/Dreyerboys