@deathmailrock
I couldn't care less about this manga (again this is fiction), and whether this counts as rape. Your views on sexual assault are disturbing.
I can't tell if you're very young or very ignorant about women from your comments. This comes from a place of genuine concern for a stranger who doesn't want you to believe rape is only bad because someone is ugly or needs to be married. Please seek some advice outside of a manga board with a trusted advisor.
Rape is about consent and power dynamic not your chastity.
This is most commonly seen when women are raped by men where the traditional power balance of strength and size is lopsided. The statistics indicate physical assaults occur highly alongside rapes. However there are many other different types of power from social, economic, bureaucratic and family relations. Your point of "most men want to have sex with attractive women" could be true. But the idea is "want" instead of forced, consent is necessary for feelings of intimacy and enjoyment. Read some statements of rape victims, they may of gotten erect or wet in a girls case but there was no enjoyment, it was a horrible and painful experience. I have no interest in explaining chastity to you since that is a very minor issue compared to the other one but it has to do with a definition of morals(religion was a big factor) instead of rape.
While this is a work of fiction you can still read the chapter and try to understand the different power dynamics at work:
1) Social, since the man would be/was blamed for the intimacy in this chapter when discovered. Despite him not initiating it was assume he was the offender.
2) Family structure, since she was the older sister she is trusted(a form of power) to take care of her sibling. There is an assumption that the older sister would not harm the brother that allowed for her actions to take place.
It was clear after my last message you rushed to justify yourself without doing reading or attempting to understand the argument. Making mistakes is part of being human but how you choose to act afterwards defines your character.
@KawaiiMajinken I don't care about the media in question, his views he defined where the issue.