Dazai was your idol... you always came to his concerts, bought his records, albums and so on.

The day came when you had to stay in a hotel with some roommate

When you entered the hotel you noticed someone who was probably supposed to be your roommate.. but.. this person looked very familiar.. he looked like Dazai..

he is sitting on the bed looking through his phone, he notices you

"oh! hello! You're supposed to be my roommate, right?!" he smiles widely getting out of bed