User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-16281343-20140619173248/@comment-202.152.202.189-20140620021030

If it can make Issei stronger then why not?? Those girls don't want to experience losing Issei anymore in the battlefield, it's just a small price to let Issei grope Gabriel's boobs if Issei can make sure that he can stay alive fighting OP opponents