Honestly, this should be tagged "Plot What Plot?" and "Porn Without Plot" because there are like hints of plot here and there, but it's largely the two of them engaging in a healthy BDSM relationship which is honestly a nice palette cleanser to all of the "suddenly there's a jealous ex" or "this other guy wants me and I don't know what to do" (even though the second one happened and Yuan wasn't for it at all).
Yeees, i feel like they're only trying plays, at this rate it'll be really boring, and will end soon, maybe if there's some kidnappings, maybe if yuan finds out that ahjussi is in the mafia and tries to run and ahjussi flips and then yuan finds out that he's a "good" mafia and convince him to leave the mafia, it's cliché i get it but we need some spice for the story to keep going, i swear if the author gives us somethings this manhwa would be peak

Aghhhhh the cutness!! Now we need some plot please, the story's been plotless since forever