The last shot we get is of L's wallet, or what I assumed to be his wallet.
A single Polaroid sticking out of all seven members of INFINITE
The Polaroid being there further makes me believe the MV itself isn't about L being madly in love and wanting to die, much like he song
But that the MV shows that the pain of losing your friends can make you want to die.
Call it a stretch and all but I would love and never will stop believing that this MV is this theory.