User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-24098614-20131223075126/@comment-98.22.134.106-20131223113224

Yeah Otaku dragons don't age and technically live forever (if not killed in battle) devils also live not forever but for thousands of years. So the life Issei plans on having with the girls will be a very long and happy one. So really no reason for you to worry about Issei or the girls dying of old age anytime soon.