Succubus Teacher/LustGrimm Again

Succubus Teacher (ティーチャー Tīchā, literally meaning just "Teacher") is a boss in LustGrimm Again, found in Succubus School.

Profile
''An elite teacher at a school for succubi. She lectures her students on everything from sexual intercourse to how to breastfeed boys, sometimes harshly and sometimes gently. She currently teaches Class 3B.''

Quote when using Observe: (Great Teacher's Oppai... Remember the initials GTO and go home.)

Strategy
Succubus Teacher is weak to Ass attacks, so focus on using these. Avoid using Nipple Suck or Nipple Suck+, both because these don't target her weakness and cause her to retaliate with Nursing Counter.

Succubus Teacher strips at a lower Vigor percentage than most enemies. According to 62-chan this makes it hard to track her current Vigor, but it's still possible by looking at her Vigor bar when targeting her with an attack.

Finally, Succubus Teacher resists most status ailments, though the stat debuffs inflicted by Mouth skills are exceptions to this.

H-scenes
Succubus Teacher has four H-scenes for when the player loses to her: giving Magrut a titjob for the first time, giving Magrut a titjob again, giving Magrut a breastfeeding handjob for the first time, and giving Magrut a breastfeeding handjob again.

Trivia

 * Succubus Teacher's line when Observe is used on her is a reference to Great Teacher Onizuka (often abbreviated to "GTO"), a manga about an eccentric Japanese teacher. "Oppai" is a Japanese term for breasts, and was presumably left untranslated to preserve the acronym.