All their issues aside, I think if Nezumi and Shion
were having sex... Nezumi would often prefer to top, though sometimes he'd be all for seme Shion. Like "Oh, yes,
yes,
**** me, Shion..." And Shion would pretty much always want to be facing Nezumi because he'd want to be able to see his face or at least feel like they're in a more equal position...
(Ahaha I'm not making much sense at the moment, I'm in so much pain today)
Also there absolutely had to be sexual tension in canon. Like holy frick, the novels...