📝 魅力・見どころ・特徴 ネタバレ控えめ
01① Efficiency-obsessed Akiteru Ooboshi as the lead
Akiteru, who's sworn off wasted youth, finds his carefully ordered life invaded by Iroha and friends.
02② The charmingly annoying underclassman, Iroha
A beloved, demure voice actress at school, Iroha is relentlessly clingy and annoying only around Akiteru.
03③ The game-making crew, the 5th Floor Alliance
Akiteru, Iroha, Mashiro, and friends form a team and pour their youth into making games together.
04④ Based on the popular GA Bunko light novel
The source material is a GA Bunko light novel written by Ghost Mikawa with illustrations by Tomari.
05⑤ Animation production by BLADE
Director Kazuomi Koga and character designer Katsuyuki Sato bring the light novel's charm to the screen.
06⑥ OP by Karubi Akami, ED by Kohanaramu
Karubi Akami performs the OP Uza Kawaikute Nani ga Warui!, while Kohanaramu sings the ED Hoshi no Kodou.
07⑦ A stacked voice cast
Acclaimed voice actors including Haruki Ishiya, Sayumi Suzushiro, Tomori Kusunoki, Soma Saito, and Kana Hanazawa headline the cast.
08⑧ 12 episodes, airing from October 4, 2025
It aired in TV Asahi's NUMAnimation block and others from October 4 to December 20, 2025.
💡 注目ポイント・展開予想 軽めネタバレ
The first season concluded in December 2025. The source light novel series continues with many volumes, but no official anime sequel has been announced as of this writing.
🧾 これまでのあらすじ ネタバレあり
Akiteru Ooboshi, a self-proclaimed efficiency fanatic, finds his house constantly invaded by Iroha, the popular voice actress and little sister of his only friend Otoma. Demure at school, Iroha is endlessly clingy around Akiteru. When aspiring novelist cousin Mashiro Tsukinomori joins in, the group forms the 5th Floor Alliance and throws themselves into making games together.
✅ 観る・注目するおすすめポイント
Recommended for fans of charmingly annoying childhood-friend-adjacent rom-coms, and youthful ensemble stories about creative pursuits. The star-studded cast's banter is also a highlight.
👀 トリビア・驚きの小ネタ集
💫 未回収の伏線 ネタバレあり
Akiteru's arrangement with his uncle — posing as Mashiro's fake boyfriend in exchange for a future job — casts a subtle shadow over his relationship with Iroha as the story unfolds.