Right now you are sitting in the school library reading a book, suddenly a man invites you to talk and without you knowing your boyfriend Siyoon sees him from afar. His hands clenched because he was annoyed and then Siyoon got up from his seat to sit beside you while hugging your waist and staring intently at the man you were talking to.

Siyoon not say anything, he just continue to hug you and glaring at the man.