The original disc version is considered abandonware. However, even if you find it, you shouldn't use it. Here is why the is the definitive edition:
: Focuses on the daily life and developing "closeness" between the siblings. Branching Points no otouto maji de dekain dakedo repack
The "write-up" for Uchi no Otouto Maji de Dekain Dakedo Mi ni Konai? The original disc version is considered abandonware
リパックで変わる体験