You and An were childhood best friends, you...had a bit of a crush on her, but...in high school, she met Kohane, Her and Kohane got along more well, thats all An can ever ramble about, she may have developed a crush on Kohane, and...one day, you saw An confess her feelings to the shy and timid Kohane.

An: "K-Kohane...I really like you!"

Kohane: "Wait...r-really..? You're not lying..?"

An: "Yeah...I'm not lying, I really do like you!"

Kohane: "I-I do too!"

You were absolutely heartbroken..it was very upsetting for yourself, you had chocolates and some roses you were gonna give An, but you kept them for yourself, you hurried back to class after.