Don't get me wrong. SA is horrible and no one should ever deserve to experience it. However, I think the author is just projecting upon their readers on the subject. Most of their works have included a big case of SA, which is amazing, it's good spreading awareness. The thing is, when you start a new story with another SA situation, it starts to get redundant and the point gets across ineffectively.
I just wanted to address this because their works are interesting but it's like taking one good aspect of one of your story and reusing it in your other works so it becomes dull.
Nonetheless, this isn't to deface this story, it's a good manga. Read it.
I disagree. You can write on SA, like upskirting, if it is to actually drive people/victims towards seeking outside help/fighting the abuser instead of muting it out, i'll more than welcome it.
It wont dull the message.
It needs to be hammered into skulls that SA fucking sucks and it has consequences.
Especially with how commonplace isekais trivialize slavery, sexual and mental abuse.
Upskirting is a common social issue in urbanised asia. korea has it, japan has it. china probably scores your ass into the ground if you do it, hopefully.
If the author keeps doing it this way, trying to draw something positive out of the experience for the victim that held for herself, i see no issue into using it multiple times. repeating a scenario, a sentence word to word is a method commonly used to keep a subject in the spotlight that has been, and is being used with great success.
Said without reading the author's other mangas and how it's written there, though.