it could just be a promise ring.
Yeah which is why I felt it was just promise rings.
Omg what's wrong with you,Voldiee?
Don't change your mind ヽ(`Д´)ノ
Jajaja just kidding buddy
I hope they will marry soon...
By the way, I was thinking about prologue...you see there is no professor on this prologue.
MC girl looked so sad while she was playing the piano on the prologue...
I was like: don't be like that...I hope professor will be okay....

Professor Seo Jin asks Hero Yeonju to marry?!
(=・ω・=)