WTH Just Happened?

What's In A Name

"We'll leave from the staircase on the 12th classes side.", I tell my friends.
"What if he already left?", asks Naina.
"I don't think so. 12th standard is always announced at the last.", I say. It's dispersal time in the afternoon and we're discussing the possibility of seeing Y again.
"I really don't think you'll see him again Sammy, at least not today.", says Jasmeet.
I take a deep breath.
"I will", I say humourously, "if he's in my Destiny." We all chuckle on that one. I'll probably be the last person on earth to believe in something as fickle and illogical as Destiny. Even if there is a thing called Destiny that commands what happens with us,whom we meet in life, how successful we end up, then I believe we ourselves are responsible for it.

Our class has been announced and we start moving out of the classroom. "The one on that side", I say, heading towards the 12th Grade corridor. We all start looking inside glass windows of the classes on the left and right, looking for Y. We can't seem to find him in any of these classes. At last, we give up and start moving down the stairs. But there's a part of me that says I'm gonna see something soon. My intuition is almost always correct.
We are at the end of the staircase, heading towards the building gate that I see something that makes my heart skip a beat. Outside, on the opposite side of the gate, strides Mr.Y, from the right towards the left.
"OMG Sammy! Destiny worked!", Naina exclaims.
"I guess it did", I say, still unable to believe my eyes.
We try to get near him, but can't as the crowd of students surge before us, all in a hurry to get out of the school campus gate, a scene too familiar. I see him move out of the school gate from a distance.
•••

I begin my research as soon as I get home. I log in my long-forgotten FB account, which I didn't deactive before just in case I needed to stalk someone, which I rather like to call 'research' than stalking. The day has come I suppose. I go through the profiles and friend lists of dozens of seniors. It's not gonna work; there are so many of them. Besides, I at least need a name to begin with. Typing "Mr.Y" in the search box is not gonna help. I keep searching aimlessly until I come across Rashmi Ganeshacharya's profile. The same girl Tahira hates. I go through her pictures. There it is! That picture Jazz sent me some time back, that had Y posing under an umbrella with his friends. I didn't pay much attention that time to realise Rashmi's presence in it. I check the picture for any tags. Everyone except Y has been tagged in it. I presume he currently doesn't have an active account. I scroll down to see the comments.
"That day was amazing", one guy has commented.
Another about four to five similar comments, none mentioning the name of the guy in black.
"Yeah I won't ever forget it, Shivani, me, Rehan and Nihal, playing with a DSLR on my terrace.", reads Rashmi's comment. I check the picture again for the tagged people and the names she mentioned. Both the girls and a guy named Nihal has been tagged. That can mean only one thing.

His name is Rehan.