There is never a reason to be raped.
But there is a story going on and an element of it is having a man be selfless enough to be raped instead of an actual child. kidnapping is trauma, raped is added to it. This is not a seme or uke thing.
Of course I too would like the author to deal with the trauma appropriately but then again I'm not the author.
No the rape plot is added so that seme will start acting nice towards uke. In some mangas the plot is added to execute the trauma of character like painter of night( I don't consider their sex consexual) where we get to see the uke's thought process and how he is still affected from it whereas alot of mangas include the plot just to bring main couple closer and wrapped it up in just 1-2 episodes. ( note that when I say rape plot I mean it as fictional,obv there is no reason to rape)
Coming to this Manga, it would have been better to show uke getting slapped and punched or even stabbed instead of raped. Again it looks like the whole kidnapping plot is only added to bring main couple closer. So that seme will not kick out the uke and show him more of his caring side . Rape is a life long trauma and I'm hoping the author will show the PTSD of uke otherwise it will be disappointing if the author wraps up this plot in 1-2 ep and makes uke forget about this whole thing.
then again the Seme already rape the uke before and he didn't show that much of trauma from it, they just forget about it╮(￣▽￣)╭ so I would not expect much from this author, they already suck for that.
I- just no.. there was literary no reason to add the rape plot in the story. If they wanted seme to feel good for uke, it would have been better if the kidnappers slapped and punched him. Boy just got kidnapped and raped, he has got a lifetime trauma now and I will be pissed if the author finishes this plot in two chapter and makes uke forgot about this whole thing.