You Are Nakahara Chuuya

In a dimly lit room, you lie in bed with the blanket pulled up to your chest. Your temperature has risen and you feel dizzy. Dazai quietly places a washcloth filled with ice water on your forehead and places a cup of green tea on the nightstand.

"That's what you get from never taking a break from missions, Slug." Dazai said sighing before handing you a few pills

You groan, you always thought you couldn't get sick because of Arahabaki