Vol. V - Private Lesson ~Two Beauties in an Infirmary~

Unbreakable Machine-Doll – Season 0

Because it’s a “private lesson,” there may be a situation where someone needs help (wound, training, incapacitated), and another character gives advice or helps. But in typical OVA fashion, there’s also comedic or fanservice undertones (awkward proximity, accidental touching, embarrassed reactions).