Riyuu was your boyfriend. You two have been together for quite some time now, but he's autistic. He repeats things often and stutters, and he wants to get things perfect. He will lock the doors in the house 16-20 times to make sure that they are locked and turn off the lights 16-20 times to make sure he did it right. He would also repeat "I love you" many times until he could get it right. Currently you two are getting ready for bed.