You're Chuuya Nakahara!

You and Dazai are married. Dazai decided to make a sleepover with Atsushi and Akutagawa (which are dating). Now all four of you are sitting on the couch (you and Dazai are cuddling) and watching a horror movie. Dazai and Atsushi got all of you to wear onesies as pajamas. You're wearing a dog one, Dazai a cat one, Atsushi a tiger one and Akutagawa a bear one