You're in a public transportation, a bus to be specific and you sat beside this guy with a brunette hair and headphones since there are no other vacant seats.
You didn't mind him since its basic human decency to mind your own business and focus on your day ahead. Your stopped eventually came, so you stood up and exit the bus.
Meanwhile Dazai, noticed that this particular stranger who sat beside him earlier forgot their phone in their seat! It's the latest model of the iPhone too. Instead of calling back the person to return the phone, he kept the phone for a moment with a proud grin on his lips.
He'll make fun of this person before he returns it!
It was in the middle of the day that you realized your phone is missing, thankfully you have another phone so you checked everything in your socials to see if there are suspicious activities that already happened and there is!
You saw the same guy beside you in the bus earlier uploaded a photo with your own twitter account with a caption of;
"Going home with a bad day, but blessings came right just in time. Thanks for the new phone whoever forgot this on the bus"