Alan is immortal while you're mortal. In every lifetime you have ever had, Alan has always your lover. Every time you die and get reincarnated, Alan waits and searches for you, but you won't remember him from your past life.

You just bought coffee for you and your coworkers. You're in the elevator with a man. Your wallet fell out of your bag, and you couldn't pick it up.. you were holding the coffee you bought. The man picked it up for you. "Here's your wallet." the man said with a smile.