if red flag , i'm colorblind

The male lead, Will "Wilhelm", is a regressor who is also a bastard child of the current Emperor. Due to jealousy, he didn't save the female lead's first love and didn't tell her that he was actually alive. He also utilized the obsession of the new Crown Princess who actually raped him in his previous life and forcing him to sire illegitimate heirs, to swiftly coup the throne.

Carcél Escalante, the male lead, is perfect. As a man, not only does he hails from a reputable noble family but he also has the perfect face and body. Although he was engaged to Inez Valeztena since he was six years old, he lead an openly promiscuous lifestyle. Did he did this cause all men are dogs or because someone manipulated his mind?

Bastian Clauvitz, is an aspiring naval officer from a nouveau riche family. He started a contract marriage with Odette, who come from a fallen aristocratic family. During their short stint of two years of marriage, Bastian raped Odette many times and aborted her child. He even tried to hurt he female lead by intentionally having a mistress. It's a mess.

The story starts off with a bet to win the female lead, Erna. The male lead, Bjorn, was a former crown prince with a scandal in his previous failed marriage. After they married, Bjorn was dismissive towards her. This causes Erna to have depressive episodes and even leads her to lose the baby she had conceived.

Alexis, is a vampire from a long-standing aristocratic family. Terrible secrets starts to unveil themselves as he exchanged an intimate relationship with his new stepmother, Linnea.

Park Yoonsu is a sociopathic vampire. He threatened and blackmailed the female lead, Chaeah for a crime she did not commit. Upon knowing her, Yoonsu becomes more attracted towards her. And they were entangled in a love game where their pride was on stake.

The male lead, Eizer Grayan, comes from a family who will "do whatever it takes" to get what they want. Upon a loveless marriage with a struggling hotel heir, Serena, he was very cold to her as he need to get all of their debt in check. His indifference extend to his act of being very permissive towards her even if it’s having an open relationship with a boy toy. He also had shot an open fire, inches away from Serena’s head in an argument.

Fu Shen Xing, the male lead, is definitely a sociopath. After his friend was killed by the female lead, He Yan, who tried to gangrape her--he is out to get revenge. He raped He Yan and humiliated her. He also separated her from her loyal husband, only after severing one of his finger. After kidnapping and confining her, He Yan is racking her brain to run from Fu Shen Xing.

Masato was born as an illegitimate son of an aristocratic family full of secrets. In order to get revenge for the murder of his mother, he utilizes the innocence of a unnamed countryside girl who strangely is good in self-defense art. He isn’t afraid to manipulate her and even steps on the girl’s adopted grandfather gravestone just to make a point. Whether he truly loves her is still a big question.

Iori was once a boy who struggles with abandonment issues, his father left him from a young age and his mother often chooses the validation of men more than fully taking care of her only son. His abandonment issues would later materializes as a full on obsession towards Riko, who is the heir of a yakuza family that adopted Iori as a caregiver. Albeit the ironically comedic ways of how the manga is drawn, the monologue often explore the depth and darkness of Iori's character.