That sums up most NTR games pretty well. There are exceptions, but a lot of them lean into absurdity and are played for laughs to make them palatable.
I realize that it wasn't the most constructive reply. The VN tries hard to get me to care for the nonsense with dramatic music and Aiko's lines 'I'm on your side.' or 'I'll protect my son from anything.' Lost it on that last one. Aiko is so far beyond cock hungry she would've jumped Kenji's dick, well head of Goichi showing up. Would make a better story too, Patreon would shut it down though.
Anyways just thinking about it, a man, mid 20s, beats and takes another man's money. What is that called? It's not bullying, Goichi is a adult, fully responsible for his actions, making him a violent criminal. Kenji thinks of Goichi as his 'arch enemy', like they're children. Aiko, the mom, thinks it's okay to go to a violent criminal's house to 'talk to his parents', again like he's a some sort of problem child, instead of filing a police report. At his house Goichi offers her beer, she drinks it, can't understand why she would, gets raped, it would stranger if she didn't, then he claims they where 'adults' having a good time. Topped all off she liked the forced sex, from the criminal, who attacked her son. Absurd! To entertain the story beyond that is absurd. My guess is the story is following far to closely to the works it's inspired by, meant for far younger characters.
I like the warm color pallet and the animations. Those alone make good gifs, but not a VN.