Aliasing saint_young_men -> saint_onii-san.
Reason: 『聖☆おにいさん』(セイントおにいさん)
Additionally, there are character tags with (saint_young_men) as a qualifier: http://danbooru.donmai.us/tag?commit=Search&name=*young_men%29
Since these are few in number, they can probably just be edited.
Updated by jxh2154