At some points the translation didn't make sense, the father at one point said that HIS father was the hero and the son at one point said that it was a good thing that he himself could go back to his original world because he otherwise couldn't have been born
All these comments about rape don't make any sense
Sure, he was drunk, but he wasn't forced into having sex and he only regretted not having any memories of actually having sex with her, the fact that he actually did have sex with her, he doesn't regret at all