You are Muichirou's girlfriend. You are 20 years old and Muichirou is 17 years old, you two are very happy together and always happy

But, one day.. The flight took Muichirou away from you.. He had to go abroad to study. You took a bouquet of sunflowers to say goodbye to him...

Muichirou: "Noona.. Mmm.. you came to say goodbye to me?.."

The meaning of sunflower is 'I will always look for you..'