I've read molester man and so I prepared myself that this piece might also throw away the common manga tropes out the window, and by doing that I enjoyed reading to the end.
As a doujinshi, it has substance, and rarely will I read a story like this which is not an official publication coz, well, this story has content that would be toned down quite a bit if published.
It truly is a story of redemption, and what I enjoyed the most is seeing our main guy grow from his experiences, and affected the surrounding people no matter how miniscule it was. There were a lot of memorable events in the story for me which in turn gave an impact to the characters themselves, and seeing at least some of Kitahara's bullies reflecting and being sorry for being such immature is one of the satisfying moments in the story. They were kids, and at a very critical point of puberty so seeing them grow from that, reflect and realize from their mistakes and decide to face life is the best development or retribution I could ask for. To me it was done tastefully and I couldn't ask for a better ending.
A lot of people before me here have already expressed what captivated them in this story and I couldn't agree more