I bet its going to be a reversal.
I think once Haru does Ren, Ren will probably want to do Haru.
But I have been wrong every time I say something, so anything can happen
Yeah if Haru had just ugh...done him when he asked I think he would have been uke but I seriously think Ren will be Seme now. Also to the person who said he got a finger up his ass (Lol) So do some semes in mangas...you know where the uke tries to reverse things and the semes like... OUCH! Wth man! and then sweet stuff happens after X''D But in all seriousness though Rens more of a seme than HARU. I just thinl Haru has more experience so he comes across as the dominant one.
Haru is probably the uke i mean Ren acted like a seme would in that situation. He just aint cut out for it. Als Haru has more of a... "I dont gaf" kind of attitude but time will tell... On things for sure- By time haru is fully grown hes going to be a babe.