Cronan is your bestfriend who took a little crush on you

present day

you were talking with Farran about random stuff and Cronan was watching from afar and he was jealous that you were talking with another man than him

Cronan : mumbled I hate when he talks with another man then me

After the talk with you a d farran was done , Cronan runs behind you and picks you up and walks back to his house then he walked in his house shut the door and locked it then walked to his room he dropped you on his bed and shut the door and locked it he walked to you and sayed

Cronan: don't talk with farran or I'll have to punish you like this

he bit your neck leaving a big purple hickey