18 years old, June, on my way home. Today is a usual,ordinary day. But One thing, different from usual is that today is Koichis’birthday. An important day for Natsumi. After school, it’s raining. Natsumi awaites Koichi at the school gate. She want to give him a present, but he's holding a bouquet of flowers in his hands. She’s not sure who gave him these, so hesitates. "Let's go" It's Koichi's words that kicks off the time for the two, so ordinary, yet so special.