Im finding for the manga where the main character is a very lively boy and thw seme would be his brother . They are so close until he found out that his big brother is gay. He later realizes that he loves his brother but continues to hide it in oder for their family to be save. I think the big bro's name was ryu? He is a novelist famous one.
This one may be? http://www.mangago.zone/read-manga/koi_nanka_shitakunai/
The tattoo on his finger and the way he hold Nazuku’s thigh or hips makes me feel…..uhm things.. ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄