Birth of a Prince and With My Smartphone

Birth of a Prince and With My Smartphone (王子誕生、そしてスマートフォンとともに.) is the twelfth and final episode of the second season of In Another World With My Smartphone anime.

Plot
Kougyoku reports to Touya that an abandoned ruins was located in the Kingdom of Lestia. Touya recalls that kingdom is where Hilde was from and is shocked to see his fiancées dressed in his previous world schoolgirl outfits. He then sees that Sakura and Leen also are wearing similar outfits and then learns that Karen told them about his outfit preference. Visibly upset, Linze asks Touya if he doesn't like them in their outfits, but he clarifies that he does, which pleases the ladies.

At the newly reported ruins, Touya enters through the gateway there and is introduced to the Rampart of Babylon by its keeper Preliora. Liora then gives Touya a brief backstory of how her rampart merged with the local Tower and claims that only a particular person can run the rampart. Touya lists the Babylons he has acquired thus far, and Liora grants him administrator access to the rampart.

Liora then guides Touya to the admin of the Tower Pamela Noel, who is sleeping under a tree. Following Touya's request, Liora tries to awaken Noel, but she refuses to wake up; hence, Liora uses a shishkabob that Touya on hand to wake her up. Before Noel could accept Touya, Noel asked that she always have enough food and a nice place to sleep. After Touya promises to fulfill the conditions, Noel accepts Touya.

Once Touya was registered as the new master of the Tower and Ramport, Liora, in Noel's place, explains its functionality. Liora then gives Touya a tour of the rampart while Touya uses his magic to carry Noel around.

Afterward, Liora is introduced to Touya's fiancées, excluding Sushi, and Touya then receives a message from Kohaku that an urgent message from Belfast has arrived. Using Gate, Touya receives the message from Kohaku, which contents read, that Queen Yuel was giving birth.

Upon reaching the Belfast castle, Tristwin shows his newborn child to Touya, who names the child Yamamoto.

By dusk, the ladies and the Gynoids enjoy the hot spring baths together and discuss having children with Touya one day. Touya would later learn this from Fredmonica and Bell Flora. They would also reveal that Touya would one day have many children from his future wives.

Furthermore, it was revealed that instead of seven wives, Touya would have nine in the future, which astounds him. Touya and his fiancées find him guilty of keeping a secret from them, and to have their forgiveness, they demand that Touya kiss every one of them. However, Touya manages to prolong the judgment until after the celebration of the newly born prince Yamato.

During the celebration, Touya has a heart-to-heart with Yumina, and he then kisses every one of them. While that was happening, the Gynoids peer into Touya's future and reveal that he also married Leen and Sakura.

Characters

 * Kougyoku
 * Touya Mochizuki
 * Hildegard Minas Lestia
 * Yae Kokonoe
 * Yumina Ernea Belfast
 * Sushie Ernea Ortlinde
 * Lucia Rea Regulus
 * Elze Silhoueska
 * Linze Silhoueska
 * Sakura
 * Leen
 * Paula
 * God of Love
 * Preliora
 * Pamela Noel
 * Kohaku
 * Yuel Ernea Belfast (Mentioned)
 * Tristwin Ernes Belfast
 * Yamato Ernes Belfast
 * Fredmonica
 * High Rosetta
 * Francesca
 * Bell Flora
 * Regina Babylon (Mentioned)
 * Sango / Kokuyou
 * Leen
 * Ende