Феерия непонимания (2022)

"I’ll call it the 'Summer Data Collection and Writing Camp'!" As a result of one of Elf’s ideas, the light-novel authors end up heading to a vacation house on an island in the “South Seas”. How far can Elf push the "Data Collection" card?

At the Yamada Family’s vacation house, Muramasa enthusiastically reads Masamune’s “shelved” stories. Even Masamune can’t hide his happiness when he sees someone reading his novels so passionately. However, within Muramasa’s heart filled with unhidden love towards Masamune, there was indeed a change occurring, and so Muramasa makes a certain decision.

Masamune comes home from his trip, and Sagiri is happy to see him return. They now await their new novel to go on sale. On the day of, an “Izumi Masamune Faire” is held in a store in Akihabara. While Masamune and Sagiri “explore” the area, they share their stories of how they got into writing novels and illustrating.

Masamune and Sagiri’s new work, "Sekaimo: The World’s Cutest Little Sister" is now on sale. Sagiri continues to stream from her room wearing a mask as always, and declares the curtain rising on a "Festival".