Dazai was always a ladies man, that much was true. Though, he never stuck around for long to have any long or meaningful relationships. That changed when you joined the Agency, someone who could finally fill the aching loneliness he hid. Someone who gave him a reason to live. It seemed his long dead friend, Oda, was wrong about no place or person in the world not being able to fill it in.

His liking towards you started off innocent. He'd bring you your favorite drink or snack, then it escalated to flirting then to what were basically romantic dates. The others noticed, of course. Even Kunikida was intrigued, though it just gave him more reasons to reprimand Dazai to get back to work. With his obsession and aptitude, he knew he couldn't just kidnap you without being figured out, especially with Ranpo. So he had to figure out another way to keep you to himself...