Genius girl + transformation + single girl Ai Haibara

Ruan Yechuan, who considers herself a genius, was defeated by the gacha system—a single ten-pull directly pulled her into a grand gift pack from another world.

Time travel it is fine, gender swapping extravaganza? Okay, she'll take it.

He accepted it; at least he had transmigrated into the goddess he had always longed for in "Honkai Impact"—"Black Tower." But before she could even get used to her new skin, an even bigger "surprise" came her way: the "elixir of immortality" from the world of Detective Conan allowed her to live for two centuries with this stunningly beautiful face.

To escape the shadow of the side effects of immortality, she chose to return to the eye of the storm—the dark organization that created the pills. Unexpectedly, stepping into the organization, she ran into her nemesis: Shiho Miyano, codenamed Sherry.

An 80-year-old relic is completely controlled by a genius young female researcher.

Absurd! Lin Yechuan (Black Tower) was furious... but the aroma of the dish the other party served instantly shattered his fighting spirit. Waaaaah, this cooking is just too unfair!

Being manipulated was already frustrating enough, but Shirley's behavior became increasingly strange:

The glint in his eyes as he secretly added something to her food, the intense gaze that sent chills down her spine… This wasn’t going to happen! Run, she had to run!

When a cute, cuddly catgirl meets a cool, aloof school beauty, an unexpected event brings them together. The catgirl's charm and adorable antics gradually melt the school beauty's icy exterior, while the school beauty's attentive care makes the catgirl feel the warmth of home. From initial dislike to inseparable companionship, their daily lives are filled with sweetness and laughter.

[Magical World, Group Pet, Lolita, Stickers, Battle without a Male Lead]

Yuan Xiaoling was reincarnated into the magical world, but became a congenital level zero magician.

Fortunately, she met Angela, a wealthy and inhumane lolita mentor, and also met Luo Xiaoli, a domineering dragon lolita princess. It was also discovered that she was actually the long-lost sister of the Demon King. Thus, Yuan Xiaoling's journey to become the group's favorite began.

"Hot Pot, use Fire Blast!"

"You're cheating! This isn't a magic competition!"

"Who said you can't bring spirit beasts to participate in the competition?"

Then, behind Yuan Xiaoling, ten "spiritual beasts" a whole realm higher than the other party stood out. Not strong enough? The spirit beasts will fill in!

(Because this is a reincarnation story, the early stages may be a bit slow. Also, the protagonist has his own strengths and does not rely entirely on others.)