Revenge on the twins / Menage a Twins

The main character of the hentai is a young guy Minoru-kun. He is a confident man with a high dependency on sex. Minoru meets online a woman named Akane, who is older than him and engages in unrestrained sex with her. However, soon he notices a suspicious resemblance of Akane to his mother and realizes that she is most likely her twin sister...