IMO, this is a one sided love story. Shiro loves Kii. Kii needs Shiro to satisfy his sexual hunger. He knows Shiro feels guilty about not being able to help him in the past when he was raped. Kii is just an asshole. He does not deserve Shiro. That I love you during sex is because Kii loves what they're doing, not like he loves Shiro.
IMO, this is a one sided love story.
Shiro loves Kii. Kii needs Shiro to satisfy his sexual hunger. He knows Shiro feels guilty about not being able to help him in the past when he was raped.
Kii is just an asshole. He does not deserve Shiro.
That I love you during sex is because Kii loves what they're doing, not like he loves Shiro.