Manga by author Kusakawa Nari - Status ongoing

Quinta is an infamous grand witch who has lived over 300 years and is known for her cruelty and killing other witches. She's shrouded in mystery and secrets, but the truth is, she's actually only 16 years old. In an unexpected turn of events, Quinta becomes a bodyguard for Nestor Gilroy, a renowned professor with 5 PhDs, who is being hunted down for his unpublished research. Together, Nestor, Quinta, and her animal companion Feeyo embark on a journey in order to have Nestor's results published.

Even in modern Japan, ninja still hide in the shadows. Young ninja Yodaka has received his mission--protect high school student Aoi at all cost. But can a ninja survive the wild world of high school while also fulfilling his mission?