| Relation | Onii-chan ni wa Zettai Ienai Taisetsu na Koto. |
| Title | | お兄ちゃんにはぜったい言えないたいせつなこと。 初回限定版
Onii-chan ni wa Zettai Ienai Taisetsu na Koto. - First Press Limited Edition |
|
| Publication | Non-free |
| Platform | Windows |
| Medium | 1 DVD |
| Resolution | 1280x720 |
| Voiced | Fully voiced |
| Animation | - Story scenes
- Sprites not animated
CGs not animated - Erotic scenes
- Some fully animated scenes
No background effects
No facial animations |
| Engine | μ-GameOperationSystem |
| Released | 2013-01-11 |
| Age rating | 18+ |
| Erotic content | Contains erotic scenes with optical censoring |
| Developer | Mink EGO |
| Publisher | Mink EGO |
| JAN | 4940733200017 |
| Links | Official website, ErogameScape, DMM |