Imouto sae Ireba Ii.

Novelis populer Itsuki berjuang melawan kebuntuan kreatif saat menyambut teman-teman untuk makan malam dan malam permainan.

Itsuki Hashima is a popular, young novelist. However, he is obsessed with little sisters and his works seem to always include little sisters, so there's some difficulty coming up with a new series. One day, his younger step-brother Chihiro and his colleagues, Hayato Fuwa, Nayuta Kani, and fellow college student, Miyako Shirakawa show up at his apartment. They enjoy dinner, drinks, and a game. That night, Nayuta makes advances towards Itsuki, but... (Source: Crunchyroll)

Nayuta dan Miyako bertemu Itsuki yang sedang berlatih peran kakak perempuan dalam keadaan telanjang.

Nayuta and Miyako walk in on Itsuki, who was naked in front of the bathroom mirror, trying to act out the little sister character in his new volume. Itsuki is everything to Nayuta, and Miyako secretly has some feelings for Itsuki, but Nayuta also cherishes Miyako because she showed her compassion in her time of need. Nayuta invites Miyako to the hotel she's staying at and immediately gets naked. She then asks Miyako to also get naked for some kind of research for her novel... (Source: Crunchyroll)

Itsuki dan teman-temannya melakukan perjalanan ke Okinawa untuk penelitian sebelum menuju Hokkaido untuk mencari makanan

Itsuki, Nayuta, and Miyako have a hard time dealing with the cold and head down to Okinawa. The next day, they visit a remote island so Itsuki can do some research and Nayuta decides to flail around naked in the water. Miyako is awed by what she's seeing and eventually jumps into the water naked, as well. Two days later, Itsuki is invited by his illustrator to go to Hokkaido, where they try various local cuisines. However, Itsuki finds out that Setsuna had been ignoring a deadline... (Source: Crunchyroll)

Nayuta, Miyako, dan Haruto berkumpul untuk Hari Valentine sementara sosok baru memeriksa barang-barang Itsuki.

Nayuta, Miyako and Haruto gather at Itsuki's room for Valentine's Day, and Haruto tries to show off his friendship with Itsuki again. Toki then shows up with the chocolates that fans had sent to them. A few days later, a new face shows up at Itsuki's house. Itsuki was getting ready to do his final return for his taxes and all of his possessions are carefully inspected by the new figure... (Source: Crunchyroll)

Itsuki melarikan diri dari editor Toki ke pemandian air panas bersama Setsuna, namun menemukan pemandangan yang mengejutkan.

Itsuki is nearing his final deadline for volume 5 and flees from his editor, Toki, however he is immediately caught. However, Itsuki manages to escape when he runs into Setsuna and they both go to a hot springs. Setsuna felt like he was in a slump and wanted to see some asses to get some inspiration. But when they get to the inn, Itsuki witnesses something horrifying... (Source: Crunchyroll)

Itsuki bertemu Kaiko Mikuniyama untuk adaptasi manga Akademi Mahou

Itsuki has a meeting with Kaiko Mikuniyama, the manga artist who will be doing the manga adaptation of "Mahou Academy." She looks very refined, which makes Itsuki nervous, but apparently she loves little sisters as much as he does. The group has a little celebration to celebrate the upcoming broadcast of Haruto's anime and the manga version of Itsuki's series. The group gets together once again to watch the broadcast of the first anime episode live, but… (Source: Crunchyroll)

Itsuki menyelenggarakan sesi TRPG untuk menghibur Haruto setelah gagalnya anime.

In order to cheer Haruto up after his anime was such a flop, Itsuki gets him as well as Nayuta, Miyako and Chihiro together so they can play a TRPG. Itsuki usually plays girls in games, but for some reason, Chihiro makes out their character to be Itsuki's character's little sister, which leads to Nayuta and Miyako also making their characters sisters of the other two. Haruto becomes the GM and does whatever he wants. (Source: Crunchyroll)

Itsuki membantu Haruto mengungkapkan perasaannya kepada Miyako sementara Nayuta merencanakan pesta ulang tahun

After Haruto tells him how he feels about Miyako, Itsuki promises to help him out. Around the same time, Nayuta, who sees Miyako as an older sister, tells him that she wants to have a birthday party for her. Itsuki and Nayuta have difficulties trying to figure out what to get Miyako for her birthday, so Nayuta asks her who her favorite author is, and she responds with Itsuki. Nayuta feels jealousy toward Itsuki for the first time, since they're both authors. What was the gift that Nayuta ended up getting Miyako? (Source: Crunchyroll)

Pengenalan Mikuniyama Kaiko dan tema ketelanjangan serta pakaian dalam

Mikuniyama Kaiko is introduced.

Tidak memiliki masalah adalah satu-satunya yang diperlukan.

Menjadi Protagonist adalah Semua yang Kamu Butuhkan.

Apakah Saudara Perempuan Satu-satunya yang Kamu Butuhkan?