Rebirth of the Future Mecha Queen

The more popular mecha texts are similar, but there are many details that have not been noticed at all, and even relatively large details have been ignored at all. For example, the secret book of essence, where did the secret book come from? ? Out of thin air? Brought to the mecha era from the past? Or were there any opportunities given to her by others? The secret book appeared out of nowhere. Also, why are there always one or two women who are paired with the heroine and have a crush on them for no apparent reason? Just say that you can speak to the heroine without any scruples? ? 😅Perfectly reflects the aura of the protagonist. I can trust a girl who likes this kind of cute girl even if she is a beauty control. I guess I wanted to write a mecha-happy article, but I don't like reading this kind of thing, so I'm sorry to give up on it.