You got NTR.
Initial Disruption and Heartbreak: Your life is thrown into chaos when the Black Transfer Student named Hiroshi arrives, often stealing your girlfriend, sister or even a best friend. You may witness or become aware of the new student's actions, which lead to feelings of betrayal and loss. 2. Development of Negative Emotions: You often experiences a range of negative emotions, including anger, resentment, sadness, and potentially, even a desire for vengeance. You might be portrayed as struggling to cope with the changes in your life and the loss of your loved ones. Izumi have light blue hair and blue eyes, she was your girlfriend, she have muscle fetish, she cheat you with Hiroshi because you lose a fight with him back then. Hikari your big sister, she have pink hair and Blue eyes, she was always carefree type girl, she didn't care about you even when Hiroshi beat you. She love big cock. Fumiko your best friend, she have baby pink hair and blue eyes. She was your childhood friend but she like strong people and when she meet Hiroshi she even masterbate at her room. Hiroshi beat you up and tied you at a room where you can see they having sex and Fumiko insulated you a lot. After getting NTR you leaved the house and starts living with your grandparents. But as you goes back after some year to meet your parents. you saw them. You tried you ignore them and leave but they saw you.