Touya is now engaged to Yumina, Elze, Linze, and Yae, and he's enjoying his second life in another world as the five of them complete an extermination quest for mythril golems in order to raise their adventurer rank.

Leen notifies Touya that's she's discovered another ruin of Babylon, so they head to the Rabbi Desert in the Burning Kingdom of Sandora. Along the way the discovered a group of stranded people under attack by crystalline monsters known as the Phrase.

Touya establishes the library café, Moon Reader, partly to give those who were stranded a place to work. Then he uses the profits from mass producing bicycles at the Workshop to buy up lots of books.

While surprised by the differences from his previous world, Touya is growing accustomed to living in the new world with his smartphone. Together, he, Elze, and Linze accept a mission to head to the Royal Capital.

Touya and the others head to ruins on a new quest from the Guild to defeat a dullahan. There they encounter the ancient royal capital, abandoned after the capital was moved a millennium ago.

Touya and the others set out to investigate some magic beasts, but it turns out their destination is the castle of a mage who researched slimes, which they'd all been avoiding (though Touya seems excited?)

After returning from the Kingdom of Mismede, Touya and the others enjoy their daily life. Yet behind the scenes the women battle over the bicycle Touya created! At Sushie's request they head to Mismede and return to find Leen and Paula.

The group discovers the Tower and the Rampart of Babylon. Touya also completes the usual registration with their administrators, Noel and Liora. Meanwhile, there's sudden news from the Kingdom of Belfast that Queen Yuel has given birth.

After dying due to God's mistake, Touya is reborn in another world?! There he meets the twin sisters, Elze and Linze, and starts his new life in another world along with the smartphone he got God to let him use in the new world.

After arriving at the beach where the Nilya Ruins lie, Touya and the others take a moment to enjoy the seaside. With so many beautiful girls in swimsuits, Touya's heart is racing!

Touya and the others pay a visit to a deserted island in search of more ruins of Babylon and thanks to the efforts of his ever reliable fiancées, they finally discover the Hangar.

Touya rescues a girl in the forest, and while the technology of the Alchemy Ward is able to completely heal her, her memories remain lost and she's unable to remember her own name and how she got so injured. At her request, Touya names her Sakura.

The goddess of love pays a visit to Brunhild, calling herself Touya's older sister, Mochizuki Karen. Apparently she came there to refresh (enjoy a vacation) because Touya is so surrounded by love.

After receiving a huge mansion in place of court rank, Touya and the others begin living their usual dense, thickheaded lifestyle. Then they receive a mission to head all the way to Mismede because she'd like to use Touya's Gate spell for talks with The Kingdom of Mismede.

Touya's party heads out for Mismede once more. Then they finally arrive in Mismede's royal capital, Berge. Their party heads to the palace and gains audience with King Jamukha. Then somehow Touya and the King end up doing battle in their fighting arena?!

Touya arrives in Oedo, a Japanese-style castle town within Tokugawa Ieyahsu's domain, and quickly heads to Yae's home. There he meets their servant, Ayane, and Yae's mother, Nanae, before hearing that Yae's father and brother went off to war with Ieyahsu.

Before him lies a young girl in white panties. After Touya arrives at the aerial garden, he's greeted by a young girl in white panties, Francesca. She's the keeper of the garden.

Touya visits the capital city of the Regulus Empire to stock some books for the library café, Moon Reader, only to witness the town engulfed in the flames of war.

Lucia finds herself attracted to Touya after he resolved the coup d'etat at the Regulus Empire. Picking up on that, Yumina proposes that they welcome Lucia in as Touya's fifth fiancee.

Cloud, the Second Prince of the Kingdom of Linhea visits as the envoy for Sue's marriage proposal. While there, he begs Touya to use his teleportation magic to save his mother who is being held captive by Prime Minister Wardack.

Yumina proposes that all six of them go on dates to cultivate their love.

When Touya returns to the mansion, the problem of taking his brides awaits. Yumina and Linze (mostly Yumina) push and push until Touya accepts his engagements. Even Elze and Yae get to join in the polygyny! Hey, are you okay with this, protagonist?!

Touya discovers a new ruin of Babylon, the Alchemy Ward of Babylon, he goes through the administrator's compatibility check and becomes the Master of Flora.

Touya is brought to the royal palace by the Duke. There he finds the King, bedridden, on the verge of death after being poisoned by someone...