Manga by author Parabola - Status ongoing

Yuuya Kamigasaki is a normal, 17-year-old high school student. But suddenly, a princess who calls herself Angelia Eight Gransia appears before him from another world.

This is a heartwarming (physically) story about a former great sage who reincarnates in modern Japan and gets overwhelmed by a Japanese yandere knife.

After losing his life because of his own womanizing badness, the reincarnated former Great Sage Kenji Akiba contracts with the Great Demon Gremory in order to become the Great Sage once again, but that contract provides the opportunity for his MAX-level yandere followers, who continued loving him even after losing him, to find him, and they won't let him get away...!?All heroines are confirmed yanderes! A dangerous normal romcom at the mercy of love assassins coming from another world!