What's quietly happening in the kotatsu is... if it's an act that transcends one's position as a 'human,' then those who are in a forbidden relationship that must never be crossed, such as 'a friend's wife,' 'a newlywed ex-girlfriend,' or 'one's son's wife,' are unfolding according to instinct and desire within the kotatsu. Were you perhaps waiting for this? Hey, wife...?
