User blog comment:B214/High School DxD EX/@comment-27083298-20161029154052/@comment-1359322-20161029155735

Rias & Akeno don't look like middle-school children despite being supernatural born. And being Issei's son doesn't really sound like a good or proper reason. Kurenai is around 17-18 he should look at that age not 13-15.

Anyway this is just fanart anyway, no point going on too much.