This story makes me feel like "I'm a helpless person". I though the uke/older brother was a lawyer too like his sempai or maybe he's just working in his sempai's law office but still he was a law student before and I still don't get it why he's line/flow of thought is someone who was always or easily oppressed. Character-wise, I think the older brother has a flat character unlike the little brother who was fully-developed (suffering from psychosis). Anyways, I think the most reasonable man in this story is the doctor.
There are missing pages..