run off
https://gyazo.com/e2cc1bbaa43d9f3c8da9105787e00ea7
source: Starpuck: Gif it my all, anime win! - Page 4 - Assassins - Nerd Fitness Rebellion
run off(→ run something off) = run away
informal leave one's home or current partner in order to establish a relationship with someone else:
家出する; 【人と】駆け落ちする(together) «with»
e.g. he ran off with his wife's best friend
#phrasal_verb