Akai Ito No Shikkou Yuuyo
Complete | yoshio akira | 2015 released
A guy who can see the people's red string of destiny found out that his destined partner is a man. I didn't expect to like this story so much but I loved it. It's very cute and the characters are really good, I liked that the author focused in the couple but I wouldn't have mind having other couples (straight or gay I don't care) to see the interaction with the red string, I guess that the spin-off fills that void.
Renai Kyoutei Nukegake Nashi!