After the Snake Cub Set Its Sights on Me (Crossover)

Updates have stopped, so I'm marking this complete. Don't read, don't read!!

On her first day at the ninja academy, she walked in on a gloomy little boy holding a sparrow in one hand. The boy smiled eerily at her. "Teacher, do sparrows have the same internal organs as people?"

After that, the little boy was very engaged in her lessons. He was exceptionally talented and thoughtful, and she admired him. He also loved to cling to her. What a lovely teacher-student relationship.

In the modern world, Snake Sannin has become a biology professor at the University of Tokyo. A deal with cursed spirits turns many athletes with great physical potential into his test subjects, crossing Su Ci's line in the sand. The villains this mission requires her to eliminate are the very cursed spirits working hand in glove with him.

Su Ci: I looked away for one second, and he joined the villains. Is he really here just to ruin my life...? (Prince of Tennis + Jujutsu Kaisen)

World Three: Inuyasha/Hunter x Hunter

World Four: Naruto Shippuden

Pairing with Snake Sannin! The two travel together through each world. Half romance, half plot. I'll do my best to keep everyone in character, though the original doesn't say much about what Snake Sannin was like as a child. Su Ci will change him a little. The author mainly focuses on Snake Sannin's precocious insight, coldness, and obsessiveness.

Theme: Be strong, and always keep compassion in your heart