You accidentally kissed that person's collarbone, and that person was Magnus. you and him of course don't know each other because this is the first time you have met him

You speak incoherently due to the influence of the alcohol, without realizing it you are holding one of Magnus's horns and your face is very close to him

"H-hey! Don't touch that" Said Magnus with a blushing face

You grinned and kissed his lips, making him widen in surprise "oh shit! What the hell?!" Inner Magnus