User blog comment:B214/High School DxD DX.4 discussion/@comment-31035098-20170701041155/@comment-26345952-20170701045540

16? I think it was at vol 14, 16 was just a bit of an extra push to it. But then again the conflict in vol. 16 was the cause to make her eat her pride. But I wouldn't have guess for her to be in the main harem until EX happened.