なぜ、うちの妹はかわいくないのか？
おるごぅる
Oru Gouru is the scriptwriter for the 'Little Sister Game' project, and continues to introduce its story and production progress in the official ALcot development log.
Protagonist voice acting (ALcot Imouge development proposal)
In December 2025, it was announced that voice lines would be added for the protagonist, but the official release had not yet been confirmed at that time.
Title screen changes (ALcot girls' game development proposal)
The 2026 explanation plans to change the title screen as reading progress, using newly drawn CG to represent different stages.
Side Story (ALcot Girl Game Development Proposal)
The author plans to supplement the characters' lives from the perspectives of the main characters and passersby. In 2025, Mr. Oshima has already made a public trial of the story, and in 2026, he will continue to arrange side stories.
かつらぎ
Katsuragi is a signed director in the ALcot Honeycomb sibling project.
ALcotハニカム
ALcot Honeycomb Released 《Why Isn't My Little Sister Cute?》 The official ALcot development log will continue to update its status thereafter.
Hayasaka is warm
Hayasaka Kan is pronounced 'non' and is Towako Hayasaka's younger sister and a close friend of Ui Kuzuo; He is a secondary character in the development notes.
and the kudzu has long grown
Seikyū Kuzuku: "Why isn't my little sister cute?" The protagonist of the project, a second-year student at Bisen Academy, and the older brother of Kazuo Mai.
Towako Hayasaka
Towako Hayasaka is Kusaka Hisashi's first love as a child, Haru Hayasaka's older sister, and also the person Ui admires. The development notes list her as a secondary character.
Mr. Oshima (Why isn't my little sister cute?) ）
Mr. Oshima appeared in the 2025 development announcement and participated in the side story trial writing; he is a math teacher at the school.
Ge Sheng Mao Yi
Kazuo Moi is the main female lead of the project, a first-year student at Bisen Academy, and Riku's younger sister. She is disciplined in life, the women's 50m freestyle swimming club ranks second in the prefecture, and she enjoys collecting 500 yen coins.
Why isn't my little sister cute?
"Why isn't my little sister cute?" is a sibling-themed project currently under development by ALcot Honeycom. Katsu Sei kept proposing to his childhood first love, Towako Hayasaka, while his younger sister Ui felt her brother was not worthy of the person she admired; The development statement confirmation project for August 2026 has not been canceled.