User blog comment:B214/Volume 22 spoilers/@comment-90.202.240.151-20161002221704/@comment-90.202.240.151-20161003023432

of course he would be cautious but he is a pervert which means he can lose his caution quickly. Espicially if (i hope lol) lilith the hottest devil woman and in general plays sweetheart to him and is seductive more than akeno and kuroka combined. But I can see Issei not being manipulated too so i dont disagree with you.