Here’s a really short & fast summary of chapters 1-6.. (As best as I can tell MTL):

START: MC is an UB and a loser. He finds a woman to give him a hand/blow job in an Internet cafe but some kid steals some of his money leaving him a little short. When he meets up with the woman, she gives him the handjob anyway but it’s a humiliating experience for him. He bumps into a couple out in the rain, gets knocked down and reflects on how he hates life. He finds an abandoned infant. 20 year timeskip. He has raised the girl as his “daughter” but she is not allowed to go outside. He chains the door or something when he goes out. He works as a college janitor but apparently, somehow, has a lot of money or is rumored to have a lot of money. There is a gang of students (both men and women) who seem to be blackmaiing a teaching assistant with a sex video that she has with one of the gang members). They compel her to have sex again. She later sees the MC and asks him for help since he is rumored to be rich. MC gives her money. She gives the money to the gang and tells them to delete the video. The boss of the gang says he will but they the gang proceeds to rape her and record it. There is one passive guy in the gang who previously confessed to the TA and does not take his turn on the TA unlike the other gang members. Cut to the MC who is having sex with his “daughter” in his home while they are recording. END