that is what we call plot.. the author is exactly using this very usual route in yaoi..
let me copy-paste the comment i found:
aDDictedToYaoi: "Rape, used as an essential plot device, serves the purpose of bringing the two characters together in a romantic relationship. Rape functions as the catalyst for romance, speeding up the process of falling in love while providing explicit sexual scenes to arouse and pleasure the viewer. Because sex is the plot in yaoi , unnecessarily long relationship developments are eliminated. However vulgar rape may seem, it efficiently creates sex and romance in yaoi . Once the two characters are together and the feelings are mutual, there ceases to be a plot-based need for “rape as an expression of love” between the seme and uke and the sex thereafter is entirely consensual."
source: http://www.academia.edu/3993473/The_Prevalence_of_Rape_and_Child_Pornography_in_Yaoi
I don't really like this whole rape thing ! Like from the very start the uke was raped by someone he doesn't even know and for no reason... And now he falls in love?
But I still liked the smut tho ლ(´ڡ`ლ)
This and that are 2 different thing LOL