My best friend was cursed by a demon.
I want to work with the three heroines to save my best friend from the devil!
- Title: Black promise
- Developer: Charcoal Grilled Bontan
- Publisher: Charcoal Grilled Bontan
- Release date: 17 Nov, 2020
- Version: Final
- Language: English (AI MTL)
- Censored: Yes (Mosaics)
- Store: DLsite
![Black promise [V1.03] [Charcoal Grilled Bontan]](https://img.dlsite.jp/modpub/images2/work/doujin/RJ293000/RJ292585_img_smp1.webp "Black promise [V1.03] [Charcoal Grilled Bontan]")
![Black promise [V1.03] [Charcoal Grilled Bontan]](https://img.dlsite.jp/modpub/images2/work/doujin/RJ293000/RJ292585_img_smp2.webp "Black promise [V1.03] [Charcoal Grilled Bontan]")
