what title is this?

it's about a red haired fl and a white haired ml who are co-workers i think. they are in the same office, and i think the fl is his boss in the officer, but also the ml is like a detective or something that kills bad guys. the fl found out i think and somehow they ended up living together. it has a really cute artstyle and it's like a sunshine x grumpy trope or smthing

bro i can't remember the title and it is driving me nuts actually huhuhu, if anyone knows the title please let me know so i can have a good night's sleep