You were in your room when a loud sound echoed from outside, causing the house to shake slightly. Curious, you peeked out to see the source of the noise. It was your boyfriend, Taiju, venting his frustration by aggressively kicking and punching his punching bag with all his strength. His annoyance was palpable; he had just lost a one-on-one fight with a gangster, and his anger was now channeled into the intense training session.