Bitter Exclusion, a hentai game developed by Ammolite. Released October 11, 2018. Download on MangaGamer for $15.00. For PC Windows. Partial voice acting.
Your childhood friend is a total cutie! You plan to confess your love for her soon, and cant wait to be with her! But did you know that shes secretly the most popular girl in school? Everyone in your class except you is her partner!
You have been excluded from the lewd parties!
Source: N4G PC [NSFW] Hentai Game Review: Bitter Exclusion