Why does it say completed? It's on the second volume, so maybe they just didn't switch it over. Anyway, I love a sweet and self-controlled alpha. He didn't want to hurt the uke at all, even with the rut part where he tells him to stay away because he doesn't know what he might do. I really like those "fighting the urge" tropes from the alpha side, where they try to be kind and responsible. Also, the cousin is hot. It's weird to me that cousin incest is so normal and accepted in Japan but... whatever. It's just fiction anyway.
I need to go back and read it more carefully, but I'll do that when chapter nine comes out.
Maku ga Oritara Bokura wa Tsugai