[Anime Crossover] Don’t Fall for Your Teacher

A gravely ill swordsmanship prodigy refuses to accept death and makes a deal with a strange voice that suddenly appears in his mind.

Teach three assigned students the value of life and the meaning of living, and he can trade that for a healthy body.

The first student is guilty of envy. He uses the Demon King's blood to pin his teacher against the wall.

“In your heart, I'm always inferior to Yoriichi, aren't I?”

“Of course not!”

“Then become a demon with me, Teacher.”

“?”

[Task failed because the target's species changed]

Yushi: Looks like I really have to teach you all a lesson.

Inuyasha: “Nothing matters more than becoming stronger. Become the strong, or die at the hands of the strong.”

What do you do when your student is cold and indifferent? Die in front of him.

Cursed Speech Sorcerer: “Someone like me, who curses others, would be better off not existing.”

What do you do when your student's thinking is extreme? Die in front of him.

Mist Hashira: “Why wasn't I the one who died back then?”

What do you do when your student has a self-destructive streak? Die in front of him.

Even the people who care least about life end up begging their teacher not to die.

Once the mission was complete, Yushi's body really did recover completely, just as the System had promised. But a strange power also awakened within him.

And why were the students he had so thoroughly “taught” appearing in this world?

System, say something! System!!!!

[Reader Advisory]

1. Demon Slayer + Jujutsu Kaisen + Inuyasha.

2. OOC and copious headcanons guaranteed. The protagonist is very strong and has a swordsmanship golden finger.

3. An unemotional, cure-and-clear-the-missions machine. The main story does not explicitly develop romance.

5. If any of the above bothers you, feel free to leave.

6. Everything will go smoothly. The story will start when I have enough chapters saved up or enough favorites.

Theme: Cherish life, starting with the little things