User blog comment:B214/Volume 23 discussion blog/@comment-31764731-20170420000500/@comment-30048084-20170421192822

@B214 evil overlord strikes with pure logic everyone we lose this fight.

"So if they abandon the ideology of High-class with High-class only and give proper chance to those Low-class and Middle-class Pure Devils, they won't be so desperate for more Pure-blood Devils. Unfortunately, this issue doesn't seem like it's going to be solve soon"

courtesy of evil overlord

Sona's Rating Game school will shake the foundation of the Underworld however it could also help with maintaining the existence of Pure Devils. The graduates of the school will come in contact with the High-class Pure Devils and that could result in romance.

add in the possibility of what B214 said and the purity of devils will remain.