yes you're right ...
I analysed it three times. and I got confirmed it's saranghanda ....
well it could be saranghae too but, i look at the motion of his mouth so it's likely saranghanda ... hahaha
WHATEVER DOES NOT MATTER TO ME.... HE SAID THAT WORD, THOUGH !!!!
I make the slowmo GIF
THAT IS OBVIOUSLY SA-RANG-HAN-DA
it happens soooo fast *gahh*
can you guys see it ? right ?
this GIF may ruin your laptop/PC hahaha