Zankokuna Kimi ni Tomoni
残酷な君と共に · ざんこくな きみ と ともに
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
The older brother's company is at the verge of bankruptcy. The only way to prevent bankrupts is to depend on his younger step-brother's support. And the stepbrother is intent on getting his revenge on his older brother's bullying in childhood. but is this really revenge?
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections