You know that 裂く is "to tear" or "to rip up." So, if you're trying to tear or rip up something, and you're pulling it at the same time, you are going to tear up that thing, or more accurately perhaps to tear off something, since you're pulling.
Kyoko(Tokyo accent, female)
Kenichi(Tokyo accent, male)
The reading comes from 引く and 裂く.
I’ll let you know if I succeed in splitting up the couple.