The Water Hashira's Wife: A Crossover Journey Starting with Demon Slayer

She was Yinji Bai, Muzan, the Demon King’s most perfect experimental subject. She feared no sunlight, but after stealing an offering, she was picked up by the Water Hashira, Tomioka Giyu, and brought to the Demon Slayer Corps.

He was Tomioka Giyu, the silent Water Hashira. He shielded her from every doubt, protected her, taught her, married her, and promised to stay by her side for life.

When he eventually died of old age, she took his Nichirin Blade and wandered the mortal world for a hundred years, searching for his reincarnation.

Ten years of searching brought no results, until in the Zenin household in Kyoto, she met a blue-eyed boy who was being bullied.

His name was Zenin Giyu, and his gaze was as stubborn as ever.

She slaughtered every elite member of the Zenin clan with a single sword, painting the courtyard red, just to call him “Tomioka Giyu.”

At Jujutsu High, she watched over him as he grew and secretly laid her plans:

She switched things around in the Star Plasma Vessel incident, nudged Gojo Satoru along when he awakened, and questioned Geto Suguru’s heart before his defection...

Everything she did was so he wouldn’t be shackled by “justice” in this life.

In Yokohama’s dark streets, she was the “Moon Beyond the Abyss,” a name that struck fear into the Port Mafia.

She crossed paths with Nakahara Chuuya, dealt with the Guild, and pursued the whereabouts of “the Book”...

All to break the boundary between life and death, so the two of them could stay together forever.

Then Shibusawa Tatsuhiko’s fog engulfed Yokohama, and Giyu took a fatal blow for her.

When he awoke, her familiar face was reflected in his eyes. He softly called out the name that had crossed a century:

“Bai, I’m back.”

"I searched for you from the Demon Slayer era to Jujutsu Kaisen and Yokohama. A century of solitude, all for this one moment of reunion."