Internal Medicine

Every grueling year of medical school and residency was endured by Makoto Sugiura for one reason: revenge. His sister died on an operating table, and the only lead he has is a surgeon somewhere in this hospital with a scalpel scar across their left hand. That's the setup for this 2-episode OVA from 2004, and it's genuinely more plot-driven than you'd expect from the genre. Makoto works his way through the hospital staff, uncovering that something shady is going on behind closed doors — the medical drama angle gives the whole thing a grounded hook that keeps it from feeling like pure nothing. The mystery actually moves forward with each encounter, which makes it feel more structured than most titles in this space. If you liked Night Shift Nurses for its hospital setting but wanted something with a clearer revenge narrative running underneath, this scratches that itch. Fans of Bible Black who appreciate when adult OVAs bother to have a real plot will probably find something to hold onto here. It's not going to win awards for subtlety, and the 2-episode runtime means things wrap up quickly, but for what it is — a moody, revenge-driven story with a medical conspiracy at its core — it delivers more than you might walk in expecting. The character designs are clean for its era, and the pacing doesn't drag. Worth a look if the premise sounds interesting to you.