As for the person chiefly responsible for this matter, Heather, the Moonlit Lionheart Rabbit, was quite indifferent to it, for the Moon Rabbit Race lacked love.
In Moon Rabbit Society, there were only familial and friendly relationships, which leaned towards rational emotions, because such rational emotions acted as good lubricants for maintaining the order of societal development; but love...
Love was simply too irrational, prone to extremes with far too many uncertainties; for such irrational emotions, the Moon Rabbits were dismissive.
Although the Moon Rabbit Race also had family units, their domestic partners were actually assigned by a communal distribution system. Every adult Moon Rabbit was allocated a partner with whom to start a family—this was also each Moon Rabbit's duty.
However, this partner allocation wasn't random, but rather a choice made by combining aspects of one's personality and fate, essentially the most suitable counterpart for you.