The Ideal Sponger Life manga volume 12 features story by Tsunehiko Watanabe and art by Neko Hinotsuki.

With his wife Queen Aura now expecting another child, Zenjiro is dead-set on obtaining a magical healer to help her with the delivery. To obtain one, he has no choice but to travel to the Twin Kingdoms and treat with the King of Sharou. Yet no sooner does he arrive than the king makes a shocking announcement about the future of the crown! Fending off one charming guest after another, Zenjiro will need all his wits to avoid getting swept up into the murk of royal intrigue.