Honestly, I don't know about you, but I was pretty upset by such an open ending. Too many questions were left after playing the game: yes, it's clear that it's a porn game and not a story game, but man.... It's like if at the end of a book you read, there were three pages missing that explained at least partially what happened to the characters. Did Kotaro die or not? Did his mother get pregnant or not? If Kotaro survived, how did he and his mother's relationship work out? How did she behave after all of this... Did she change her mind about her son: did she remember that she was his mother, or did she continue to think of him as nothing. The author should have at least partially told about it in the afterword, where Satoshi would remember that situation, being in another city, if he (the author) doesn't have time and desire to do the project further. There are too many lacking statements, which literally breaks the playthrough of the game. That said, I have no complaints about the last scene where Kotaro almost dies and his mother is having sex with his bully: the idea is interesting, but the realization is underwhelming. It's sad.
P. S. Guys, if anyone knows the answers to the questions in this post, please share. Thanks in advance.