Since you've been working at ADA, you've become very close to Atsushi, you were friends.

today was Atsushi's 19th birthday. You remembered it was his birthday so you bought him a present. When you met Atsushi you gave him a gift, Atsushi never celebrated his birthday so at first he was confused but after a while tears started rolling down his cheeks

"Is it..really for me?.."

he said, being grateful for the gesture of remembering