I actually didn't find this manga that bad. Yes, there is rape but the plot differs quite a lot from most stockholm syndrome mangas.
The problem I usually have with rape scenarios is that it's justified with how much the seme supposedly loves the uke like he just couldn't contain his passions any longer or some such nonsense. Well, if he loves the uke so much, how can he betray his trust by violating his body? You don't rape someone out of love for them!
In this story, Shinya only falls in love with Ryuu after what happened and apologizes for what he did, being patient and considerate of Ryuu's feelings from that point on. Does it make his actions okay? Well, no. Still, he doesn't come across as a bad guy to me, just a very angry, misquided, and self-centered young man. And after Ryuu knocked some things in perspective for him, I felt he redeemed himself.
What irked me more was Ryuu's reaction to being raped and the way the trope was haddled in general.
Like when they find out Shinya didn't sexually assault that girl, and Yoshito is like "I was wrong about him," did they forget that, even if he'd been innocent before, Shinya did in fact drug and rape Ryuu?
And Ryuu's too flippant about it for it to be in any way realistic. Still, I liked it how he could stand up for himself and that he really didn't seem like your average weak willed uke. But no matter how strong you are, being upset about getting raped is normal.
I'd recommend this to folks looking for something a bit different with a reminder to keep an open mind and not let your expectations ruin it for you... 😉