no offence but this story isn't historically accurate the characters all hold pretty modern belief on love so the author could have extended this to the notion of consent but alas. Also during the said era (gives off Romantic era vibes) the concept of premarital sex was REALLY frowned upon and people really wanted to have that one true love. Linking the concept of love to sex. So by sleeping with her kinda doesn't make sense historically.
tldr:
nah fam still rapey
Links for reading if u wanna learn more:
https://www.abc.net.au/religion/how-romanticism-ruined-love/10096750
Basically still rape. Also considering she actually doesn't want to be involved with him and is using his power to get what he wants.. Don't get me wrong, I still enjoy the comic and I'm gunna keep reading it. I think it's more about out with the old, in with the new kinda stuff. We kinda slowly removing these unhealthy concepts. Unless you actually wanna read something that bad, and I do read stuff like that
So technically that was r@pe