Edit: this guy should just strap a gopro or three to himself to avoid any bullying. Can't claim he did anything wrong if he's got evidence otherwise. Plus he could take down so many bullies with the evidence. Just get a big 128gb sd card and backup batteries, record all day every day.
He should also be reporting the bullying to school officials but he doesn't so obviously this is forced writing to make this universe work.
@egie i did some research and there's some issues with "herbivore men" but also in an opinion piece a Japanese writer dating a western guy was shocked to find that her Japanese friends hadn't banged their husband's in years under the opinion that sex was only for making g kids. Also there was some survey showing sky high virginity among both sexes and non-interest in sex among women (it didn't list male survey results). I'm no expert, but it is definitely a cultural IRL issues among both tenders that's percolating into their media production.
Japanese government seems like they're in denial despite lowest birth rates probably on the planet.