Watashitachi wa Moto Joshi desu - Vol. 1 Ch. 7

[Litreara]

I hope your right but I personally think the scares were from physical abuse.

Spoiler

When I made this comment, I assumed the manga wouldn't focus on real-world science, leaving room for a different 'treatment' approach, especially given the overnight genderswap. However, since the 'treatment' for the genderswap is entirely rooted in real-world science, it’s likely to just physical abuse—possibly cigarette burn marks.