Uke is a construction worker and the owner of the company and yakuza (seme) came and borrowed him for 3 days. He is going to be pretending to be his son to get the bosses family off his back. One thing led to another and they ended up sleeping together they ended up being caught by the semes sister and the approved of it and uke will be the next leader. They ending making their relationship official and ever since have been going at it like rabbits. They go through hard ships but make it through. They happily get over Anything and end up stronger.
Doesn’t really solve the original problem or tell more on it but lots of smeggs soooooo… I enjoyed.
Sanzensekai no Karasu o Koroshi