Shiori should just ask his brother about what he heard before starting being a creepy. Hinase should know there's a high rate of deaths for genderless people, but there's no correlation between it and the deaths, right? He isn't saving nobody's life and shouldn't be doing this type of stuff before trying to know about it. It's possibly even in the internet. And if it was true, saying to them to become a girl is just the convenient, as he wants to date them as a girl, he should just say they better hurry up and choose, so they wouldn't live.