Shinya Tetsuya is a transmigrator. In his previous life, he was an overworked office drone who died suddenly from working overtime. In this life, he is Sakonji Urokodaki's senior disciple.
He thought he was just an ordinary person. So when others swung their swords a thousand times, he swung his ten thousand. Using the simplest, most grueling methods, he trained himself into the Demon Slayer Corps' Water Hashira.
Then one day, his gravely wounded junior disciple underwent a transformation in his arms.
“Senior brother... I'm still me... I just... turned into this...”
Tetsuya held his disciple, now a girl, and his mind went blank.
Then he realized this wasn't the first time, and it wouldn't be the last. The men he defeated would all gradually turn into women. Their memories remained, and their personalities didn't change; only their gender did. Afterward, their feelings for him grew somewhat stronger: admiration turned to attachment, and gratitude turned to love.
The problem was, he really hadn't done anything.
He had simply fought as usual, saved people as usual, and treated everyone with ordinary kindness. He had just kept watch through the night when Makomo was injured, risked his life when Kanae was in danger, and offered Kanao a rice ball when she was lonely.
And then they all came to him.
After the battle at Infinity Castle, when everyone stood before him, he finally asked, “Are you... sure?”
No one answered, but their eyes told him everything.
This is the story of a hardworking genius who unknowingly wins everyone over with his strength and kindness.
The battles are thrilling, the daily life is heartwarming, and the romance develops naturally.
As for the junior disciples who changed into women, they don't mind, so what can he say?