Quick Wear Ace System Childbirth Manual

As an ace system, it has assisted countless hosts and finally started its own fast-travel journey (also known as: expected retirement mission). The poor little guy I met in the beast world is pitiful, weak and cute, he can't live without me. The modern overbearing little brother is pitiful, weak and helpless, he needs my help. The little instructor in the campus is serious and righteous, he needs the company of his cub. The cold-hearted general in ancient times, he needs a cub. But later, the plot is a bit wrong...