
Yui perceived the sexual act as love when he was younger.The body remembers those and he must've response because the act felt pleasurable. I think he doesn't know what real love is supposed to be and how it truly feels.
It's like the nii-chan branded him and now binds him to his will.
Fucked up like to the max. I hope the nii-chan can rot here on earth and more so in the afterlife.
I think yui can definitely overcome this "obsession and love" if he has the right help,environmental conditions.Heck just leave the parents and the city altogether.
Well. This is just one of those days
(☉౪ ⊙)