After Traveling Through Time with the Evil Master, Why Are All the Disciples so Sickly?

The evil master who traveled through time and was about to die without a burial wanted to commit suicide and exit according to the system requirements, but unexpectedly due to the contrasting behavior of "hard-talking and soft-hearted", he forcibly turned the heroine of the original book, the supreme master of the devil world, and the ascetic master into his yandere fangirl!