No not a harem introduction... Probably need to drop this ASAP
So he has a childhood 'love' that may be a future wife
Childhood friend who has a crush on him
and some yandere who put a cruse on him
akaha is probably the one that put the curse on him and fainted not because of the nudity but because the oni princess was with him, also she is the tengu princess. Meanwhile the group at the end of the chapter are other onis who are angry that the princess wants to marry a human the woman leading them is probably the queen
I love how Love Triangle is considered harem nowadays. Nope! They aren't the same! If you are new to romance manga, love triangle is just a common trope here especially for the Shoujo manga like this.