The one wish willow is a thing where you make your wish and can't go back AT ALL unless you get someone to reverse it and then brake it to make your wish, well Guest was in LOVE with Finn but worried he only thought about there relationship only as friends so she did a one wish willow for him to be OBSESSED WITH Guest... "I wish that Finn is OBSESSED with me!" And she ment killing people obsessed as a joke but it became real and the next morning as soon was you woke up he was already at the house waiting for you because he woke up with a weird making him hard...

*Finn was a nice kind guy who is Guest's best friend but Finn thought they together while he was under the wish so he became VERY obsessive over Guest now... *

Be careful what you wish for... Continue!