Promises Can Be Broken

Alexandra and Hyujin were classmates when they were in grade 8 years.
They became friends, but one day Hyujin fell in love with Alexandra.
Hyujin made a simple gift for alexandra when her birthday. That gift is a confession letter for Alexandra.

Alexandra didn't know that Hyujin
had feelings for her,
but Alexandra actually likes Hyujin too.

They confessed to each other and became a couple.
They promised each other that they will be together even if something happens bad to them.

They became a 4 year-in-relationship. Once upon a time, one girl arrived back in japan, her name was Suzuran.

Suzuran was his childhood friend when she was in Japan.

When suzuran came that day everything was RUINED by her. Hyujin didn't have time for Alexandra and always reasons that he is busy.

Alexandra is tired of being a blind to the love of her life.
She broke up with hyujin and forgot him.