Responses

SPOILERS
Minhyung (the psycho) harbors a twisted obsession with Yijae, the older foster-brother (MC) who raised him since childhood because Minhyung became an orphan after his parents died
He constructed an increasingly possessive bond, manipulating events so Yijae becomes dependent on him (it was so unhealthy to the point that Minhyung killed Yijae’s boyfriend to be his replacement instead and threatened to kill ppl whp got close to Yijae).
I didnt read the story but i do have a general idea through comments but why are people calling the psycho as the MC's brother ? I thought MC and his dead husband adopted the psycho ?