Responses
The fact that he was scared from the beginning means that he already fell for him but choose to be in a denial stage, because he already knew if he did it with him his body will react to Doumeki's touch immediately like a princess in her first night, that's why he got scared more and more when he started to lust for Douemki !
Look at page 33, from back then he was still scared
http://www.mangago.zone/read-manga/saezuru_tori_wa_habatakanai/mf/v01/c003/1/