PLEASEEE HELP ME FIND THIS BL

ITS A BLONDE ML AND DARK HAIRED MC, THEIR LIKE AGENTS?? i think they live in the same building or smth, the ml peels onions- the dark haired suffered memory loss and was a prison guard before?? he was nice to the blonde prisoner and he became obsessed yada yada yada- I CANNOT REMEMBER ANYTHING FOR THE LIFE OF ME BUT I KNOWW THAT THE PEELING ONIONS WAS SIGNIFICANT?? and im pretty sure they get a happy ending, please please please somebody help me, my secondborn child shall be handed to you, unless you wish not- PLEASE