I think it is pretty good if their feelings start to build over time rather than them having sex and falling in love right away.
Agreed.
then, rape will lose the very reason it is used..
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
Their feelings for each other are quite vague huhuhuhu. Not sure if I like it?