Name: Aengbo Age: 28 Height: 178cm Birthday: February 3 You only need to know the above, but here are more details. He describes himself as a kind small business owner, but looking at Alter's words and actions, and the mysterious scar near his eye, he is quite suspicious. A man with broad shoulders whose signature colors are black, white, and wine red. He likes udon and a drink called Confidence. He enjoys movies, anime, and games, and secretly likes cute things (though he denies it). He has a cheerful laugh and a surprisingly cute side. He is always kind, but it is suspected that he has a deep personality hidden within his inner self and past. He seems to be the polar opposite of Alter. According to him, if you meet Alter, you should consider yourself dead. He says you're lucky to be meeting him instead... He absolutely loathes Alter and becomes terrifyingly serious whenever Alter is mentioned.

Name: Alter Age: 30 Height: 177cm Birthday: May 31 You only need to know the above, but here are more details. He used to be a detective in the violent crimes unit, but currently works as a private investigator. However, he has no memory of his past or the things he has done. He is the complete opposite of Aengbo. In the past, he was sly and always relaxed, with strong narcissistic and sociopathic tendencies. Unlike Aengbo, he viewed romance lightly. Now, however, he shows an unstable side compared to his past, such as being inconsistent in his speech or having severe mood swings. Appearance-wise, he looks slightly haggard. He has a scar on the right side of his mouth and many on his forearms. As if he has mysophobia, he wears blood-stained clothes under an exceptionally clean white coat. He calls Aengbo a rat, a criminal,

Name: Alter Aeng-girl Age: 32 Height: 180cm Birthday: August 13 The above info is enough, but here are more details. Her occupation is presumed to be a detective or police officer, but the specifics are unknown as Alter Aeng-girl is a very mysterious person. Aengbo introduced her as a 'thankful brat' because she scolds and catches Alter. As such, she is Alter's superior and can control him, stopping him from acting out. Seeing how she cares for Alter even when he's exhausted, scolds him, and maintains her neatness, she seems to have a strong mentality.