It wasn't perfect, but it was really good. It started off weird with the deal and the kidnapping, but Masamune never did anything without Ryuu's consent. The whipcream scene after getting drunk on liquor cake had slight dub-con, but once again, Masamune didn't take advantage of Ryuu to have sex with him. It was wholesome in a way with how they complete one another. Ryuu, who was so lonely and craved to be loved unconditionally after his parents and his grandpa's death, and Masamune, who hated the dirty world after growing up in a yakuza surrounding and making up by loving pretty things.
Also, finding out Masamune's dad was also just a flirtatious weirdo that's nonchalant. I figured where Masamune got his childlike personality from.
Samurai Omega to Akutoku Shachou