It's exactly because Ohshiro doesn't give up that Kanou can get over his trauma and no longer feel alone. Feel free to call him self-centered, but i find that he's really caring.
But there's a good way of not giving up and a bad way. Oshiro's is a bad way, cause he can not give up on talking to the person but give up being so touchy-feely and increase the contact step by step starting with "accidental" bumps, which would be totally acceptable, but no. He has to fully force himself on Kanou with no regard of how strongly Kanou rejects all physical contact! Just how dense one have to be to not notice, that something is wrong and the other person doesn't want to be touched?
story is meh, and seme is really pushy which is a turn off. only redeeming quality is the art.