In a way, it’s kinda interesting that they manage to find a way to “help” people who got in Gensokyo to go out without being eaten by a youkai... GETTING THEM DRUNKED UP!... I guess that makes senses ever since the whole ULiL thing happened and they thought how to find a way to bring outsiders back to the outside... even though they still don’t know how old were they (since this book happened before R53M (and also, DBOA)), of course Renko and Maribel would be in between 18 and 19 years old at best...