Nice looking couple there.
I've been raised with Christian beliefs too, but people here seems to think that anime, manga and games are weird when you are in high school, because you have to do what everyone does, and more weird when you grow up, because they are "kids stuff".
People have their beliefs and convictions. Sometimes they can be based on living humble lives, other times they can be based on strange, sometimes unbiblical ideas. A specific social group will tend to hold on to the same or similar ideas. Just kinda the way things go and I don't begrudge anyone any of it.
My dad thinks video games and anime/cartoons are for babies (he even said that to me a few times when I was a kid even, like 8–12 years old) but he's never prevented me from enjoying any of it. He didn't really like the more violent games and I'm sure he'd have some beef with the sexual content that was in a few anime I enjoyed then, but he's been cool in trusting me to do what's right.
Granted, I used that freedom to get into some very sleazy horror/exploitation films in recent years
but I've recently become convicted of that by the Holy Spirit and have weeded a lot of the more extreme movies out of my collection.