Same author as "Beethoven Syndrome" which explains alot.
Since the author recently turned that story into a netorare cuck fantasy in the side stories after the FL and ML get married when most the readers thought it was josei smut. And are in shock what the author did to characters and story in the sides doing a 180. FL becomes a total slut craving gang bangs and being railed in all holes. And so called "possessive" ML becomes a cuck who schemed events and manipulated FL (his wife ) into having sex with different men and now craving it.
You have no idea how crazy the recent genre flip to NTR is for that
Even your bog standard Pornwha seinen (including those with NTR themes) isn't as depraved as what the Beethoven Syndrome (Should be called Netorase Cuck Syndrome now) became. Its down right evil what the author did.
The ML went from "She is mine" and "your body only belongs to me" to coercively manipulating his "wife" into wanting & having sex with other men and even spreading open her legs to expose her vagina to the two randoms she doesn't know after he has sex with her and says "who wants to go next in her vagina?". He asks his "wife" if she will let one of his "friends" that is inpatient waiting his turn because the FL is getting railed by another guy, if she will let the guy do anal (something FL didn't even do with the ML).
FL also comments to herself why she is being roughly that the guy screwing her has and she could get "addicted" to this type of rough emotionless. Implying she preferred the rough pure lust and no emotion sex and being treated like a piece of meat by that strange guy than "affectionate" sex she has with the ML.
The recent chapter ends with the FL get her first taste (and most likely not last taste of being gang banged by strange men) saying that she is "sore" (since they were rough) but she enjoyed the experience and wants "more".
So,Now imagine readers who were invested in what they thought was a Josei Smut and who already hated the ML because he more or less is the reason the FL's mother got killed, see the ending where he confesses his love and they get married only to see the NTR horror the side stories transformed the story into? They are expecting fluff int the stories instead will get SoEun 2.0 and a japanese style hentai cuck netorase fantasy shift.
Yeah readers are going to horrified after they see the "happy ending" of them getting married to the ML scheming to have his wife gang banged and Double Penetrated by his "friends" without a condom and treated like a semen dump by other men. And grooming the FL to become "addicted" to it and wanting "more". Why did the author have them get married if that was the outcome? And the official site deceitfully labels the series as Josei 19+ and ML as an "obsessive possesive" male when now he is a netorase sadistic cuck. What "Posessive" man Asks for his wife to have anal with another man and be double penetrated raw without a condom letting the men cum inside also? Lol he literally spread open her legs and vagina told the guys "who wants to go next?" and then they then proceed to stick both their dicks at the same time until one of them pushes the other off. The FL gets treated lower than a whore by her "husband" and the men he recruits to f*ck and grope her. It is like a horror series. Espeically now after the FL has been officially initiated into becoming a depraved brainless wh*re like her husband wanted she said despite being sore (because they were THAT rough with her) that wants "More".

These poor fucking girls bro. And the one with her stepdad who only now became an adult. He’s making her sick his dick desguised as cooking. Whoever wrote this is sick