The Water Hashira's Successor Wants a Happy Ending

A quick recommendation for my new story: "[Haikyuu!!] Do We Really Have to Wait Until After Graduation to Date?!"

A quick preview of upcoming stories: the derivative work "What Do I Do When Everyone Around Me Is a Baseball Idiot?!"

Original light novel "The Flames of Nocturnus"

"That Junior Keeps Trying to Hit on Me"

[Main story complete] [Apologies for OOC]

A few tips:

1. The timeline has been changed.

2. There's a hidden Wind Hashira × Flower Hashira ship.

3. The story includes the canon ships Snake and Love, Tanjiro and Kanao, Zenitsu and Nezuko, Inosuke and Aoi, and Akaza and Koyuki.

4. I won't add any other characters or ships to the original story.

5. The author doesn't ship Giyu and Shinobu or Douma and Shinobu.

6. This isn't a standard happy ending. It's closer to the true ending in the author's heart, or an open ending.

[Blurb]

Having been reborn into this world, Kurokawa Yuu only wanted to live a peaceful life. Then an accident bound her to the HE System, and she learned the story of the world.

Kurokawa Yuu swore to kill every demon under the sun and achieve a perfect happy ending.

A user of Water Breathing, she quickly became the Water Hashira's Tsuguko. Kurokawa Yuu boldly told the Water Hashira himself that she would slay a Lower Rank demon within a year and take his place as Water Hashira.

She thought she was joking, but the Water Hashira took her seriously.

The man nodded solemnly. The corners of his mouth, usually set in a straight line, even lifted ever so slightly. "...That would be wonderful."

"?"

Wait, I was only joking.

After joining the Demon Slayer Corps, her days became incredibly busy. Guided by the System's prompts and the Corps' orders, Kurokawa Yuu was either on her way to slay demons and save people or training her body and swordsmanship.

In her free time, she could go shopping with Shinobu and Mitsuri, try salmon daikon with Giyu, and write letters to Mr. Urokodaki, who lived far away on Mount Sagiri. But perhaps because of the butterfly effect, the Flower Hashira encountered an Upper Rank earlier than expected.

With no time to prepare, Kurokawa Yuu went alone at the System's prompting and dragged the demon off a cliff with her.

When she woke up again, someone, or rather, a demon, had her pinned against the wall by the throat. "Why do you look so much like her?"

"?" What is this, a doppelganger romance?

But Kurokawa Yuu didn't have time to complain. Her throat was so dry. She wanted blood.

Her sharp claws dug into the man's flesh, and she bit down on his arm...

Pairing: Water Hashira

Bonus Scene 1:

After turning into a demon and waking up with amnesia, Kurokawa Yuu listened as the System explained the situation at length.

Her resolve, her mission, her wish to kill every demon in the world.

The girl looked dazed as she pointed at her demon head with a long fingernail. I'm supposed to kill myself?

Bonus Scene 2:

Upper Rank Two initially demanded that Kurokawa Yuu come sing for him every day. But after her passionate performance...

"Shut up. Just sit quietly wherever I tell you. Smile for me... She never smiled as fake as you do."

Kurokawa Yuu: Continues baring her teeth in a fake smile.

"Get out."

"You got it."

Theme: Celebrating the courage and bonds of young people.