>>714697693
I don't know why it added 'tugging', but ケツ is a slang term for butt, so I guess it got confused.

>>714697979
Yeah? That's why I said it seemed fine.

>>714697636
Yeah, something like what >>714698373 says. The way I read the dictionary, it's like this:
>決心
Making up one's mind.
>決意
Solidify one's will.

They can be used somewhat interchangeably, but the emphasis is different.